Secondary transmission of infection is especially efficient within households.8-10 Thus, when housing is shared (e.g., households or co-housed persons such as families, incarcerated persons, students, or military recruits), every effort should be made to physically separate the quarantined person from others such as by having the quarantined person reside alone in a separate closed room or closed area and with exclusive use of their own bathroom. *  The model estimates what occurs in a person who was infected in terms of how likely they would be to infect others were quarantine discontinued. Travelers who test positive should remain in isolation and delay travel until they meet criteria for discontinuing isolation. With this strategy, the residual post-quarantine transmission risk is estimated to be about 5% with an upper limit of about 12%. CDC twenty four seven. Ideally, travelers’ consent should also be obtained before testing to notify the airline of a positive result. To receive email updates about COVID-19, enter your email address: Options to Reduce Quarantine for Contacts of Persons with SARS-CoV-2 Infection Using Symptom Monitoring and Diagnostic Testing, Centers for Disease Control and Prevention. CDC twenty four seven. Variation in False-Negative Rate of Reverse Transcriptase Polymerase Chain Reaction-Based SARS-CoV-2 Tests by Time Since Exposure. Earlier testing, i.e., more than 3 days before travel, provides little benefit beyond what self-monitoring alone can provide. When this separation is not possible, then the household members risk exposure to COVID-19 if the quarantined person develops the illness. You will be subject to the destination website's privacy policy when you follow the link. These recommendations are based on the best information available in November 2020 and reflect the realities of an evolving pandemic. Saving Lives, Protecting People, Framework for Conditional Sailing Order (CSO). Previously, the CDC defined a close contact as 15 minutes of continuous exposure to an infected individual. Modelers from the University of Utah School of Medicine estimated the post-quarantine transmission risk accordingly (unpublished data). Predeparture testing is important to prevent transmission during travel but is less likely to detect infections in travelers who might have been exposed after their predeparture test or who were infected close to the time of testing. For more information on this testing requirement, see the Frequently Asked Questions. Optimal COVID-19 quarantine and testing strategies. † Monitoring can be conducted using any method acceptable to local public health authorities and could include self-monitoring using an approved checklist of signs and symptoms, direct contact daily by public health authorities or their designates, or automated communications systems (e.g., on-line or texting self-checkers). Testing of persons seeking evaluation for infection must be prioritized. SARS-CoV-2 seroprevalence and transmission risk factors among high-risk close contacts: a retrospective cohort study. Furthermore, a lower sensitivity test (e.g., antigen test) closer to the time of travel (i.e., with rapid availability of results) can be as effective as, or more effective than, a higher sensitivity NAAT (e.g., reverse transcription polymerase chain reaction test [RT-PCR]) performed several days before travel. Oran DP, Topol EJ. Options for travelers with confirmed or probable COVID-19 are private vehicle or approved medical transport (i.e., ground or air medical transport with infection control precautions in place to protect vehicle operators and medical personnel). Implementing quarantines can also pose additional burdens on public health systems and communities, especially during periods when new infections, and consequently the number of contacts needing to quarantine, are rapidly rising. Crew members who follow their carrier’s occupational health plan as well as the FAA-CDC guidance are not subject to CDC’s recommendation to stay at home after international air travel. Added information about transport of individuals with confirmed or probable COVID-19 or known exposure to someone with COVID-19. Available at: https://www.medrxiv.org/content/10.1101/2020.11.23.20237412v1external icon, Clifford S, Quilty BJ, Russell TW, Liu Y, Chan Y-WD, Pearson CAB, et al. Identify a workplace coordinator who will be responsible for … CDC and the Federal Aviation Administration have jointly provided Updated Interim Occupational Health and Safety Guidance for Air Carriers and Crews pdf icon[PDF – 7 pages]external icon. CDC recognizes that any quarantine shorter than 14 days balances reduced burden against a small possibility of increasing the spread of the virus. CDC recommends testing with a nucleic acid amplification test (NAAT) or antigen test and receipt of results 1-3 days before departure for international travelers, particularly those traveling long-distance on public transportation conveyances, such as airplanes, buses or trains, or passing through transportation hubs such as airports where social distancing may be challenging, as a means to reduce the risk of SARS-CoV-2 transmission during travel. Although a 14-day stay-at-home period provides the greatest reduction in transmission risk, it may be perceived as burdensome and incompatible with. Shortening quarantine may increase willingness to adhere to public health recommendations but will require evaluation; not only in terms of compliance with quarantine and contact tracing activities, but also for any potential negative impacts such as post-quarantine transmission. May 28, 2020. CDC’s recommendations for the assessment of and response to HCP exposures to SARS-CoV-2-infected patients have evolved as the incidence of COVID-19 in the United States has changed. These recommendations for quarantine options shorter than 14 days balance reduced burden against a small but non-zero risk of post-quarantine infection that is informed by new and emerging science. Individuals who have been exposed (i.e., close contacts) to a person with confirmed COVID-19 should remain in quarantine and delay travel until they meet criteria for release from quarantine. All travelers should be advised to take precautions to protect others until 14 days after arrival, including social distancing, wearing masks (including in shared spaces within households, by both travelers and nontravelers, when only some people traveled), hand hygiene, and monitoring themselves for symptoms of COVID-19. Testing before departure results in the greatest reduction of transmission risk during travel when the specimen is collected close to the time of departure. CDC’s recommendations and considerations for public health management of international and domestic travelers are provided below. The variability of SARS-CoV-2 transmission observed to-date indicates that while a shorter quarantine  substantially reduces secondary transmission risk, there may be settings (e.g., with high contact rates) where even a  small risk of post-quarantine transmission could still result in substantial secondary clusters. CDC modeling indicates that testing on the day of travel provides the greatest reduction in transmission risk while traveling (Johansson et al). Figure. For testing, the model assumed that the diagnostic specimen would be collected up to 48 hours prior to the proposed end of quarantine. All travelers should be advised to take precautions to protect others until 14 days after arrival, including social distancing, wearing masks (including in shared spaces within households, by both travelers and nontravelers, when only some people traveled), hand hygiene, and monitoring themselves for symptoms of COVID-19. A single test at 1-3 days post-arrival provides a greater reduction in transmission risk at destination than testing only prior to travel, although the reduction in risk is still relatively small. Decisions about whether to conduct follow-up and what it would involve could be based on the status of the COVID-19 outbreak in the jurisdiction, status of the COVID-19 outbreak in travelers’ countries or states of origin, the volume of travelers, available resources, competing priorities of public health officials, and other factors, as applicable. The 7-day period should be completed even if the test is negative. Travel poses a risk of introducing additional cases of COVID-19 to destination communities. Prevalence of Asymptomatic SARS-CoV-2 Infection: A Narrative Review. To reduce introduction and spread of new variants of SARS-CoV-2, CDC issued an Order pdf icon[101 KB, 9 pages] effective January 26, 2021. Steps for People to Take After COVID-19 Testing (July 27, 2020) PUI Isolation Guidance (August 5, 2020) PUI Visitor Log (March 18, 2020) The Centers for Disease Control and Prevention has broadened the definition of what it means to be a "close contact" of a person with COVID-19. Mobile applications or automated text messaging may be useful to provide information to travelers or conduct monitoring of travelers. CDC continues to endorse quarantine for 14 days and recognizes that any quarantine shorter than 14 days balances reduced burden against a small possibility of spreading the virus. In this context, quarantine is a critical measure to control transmission. In the absence of testing, this period should be extended to 10 days. The Centers for Disease Control and Prevention announced it will reduce the quarantine time for those exposed to the novel coronavirus, CNN reports.. Although daily monitoring for symptoms of COVID-19 illness reduced the estimated post-quarantine transmission risk, addition of diagnostic testing for a person who remained asymptomatic substantially reduced the estimated post-quarantine transmission risk, especially after Day 5. Strategies to reduce the risk of SARS-CoV-2 reintroduction from international travellers. The scenarios below assume all travelers self-monitor for symptoms of COVID-19 and self-isolate if symptoms develop. They are not intended to be used in developing policies for management of individuals with probable or confirmed COVID-19 or those who have had close contact to a person with COVID-19. 2020; 2020.10.27.20211631. doi:10.1101/2020.10.27.20211631. As long as crew members re­­­­­main asymptomatic and have no known exposures to a person with COVID-19, they may continue to work on flights into, within, or departing from the United States. Centers for Disease Control and Prevention. People who are quarantined with others, as well as the person in quarantine, should take steps to prevent spread of infection within the household (e.g., NPIs, a.k.a. It requires all air passengers arriving to the US from a foreign country to get tested for COVID-19 infection no more than 3 days before their flight departs and to provide proof of the negative result or documentation of having recovered from COVID-19 to the airline before boarding the flight. CDC twenty four seven. For example, for a modeled quarantine that would end on Day 7, the diagnostic specimen could be collected starting on Day 5 or thereafter. Grijalva CG, Rolfes MA, Zhu Y, et al. The Centers for Disease Control and Prevention has new guidance clarifying what exactly “close contact” means when it comes to transmission of … As part of a broader strategy aimed to limit continued new introduction of SARS-CoV-2  into U.S. communities, all travelers should remain vigilant for signs and symptoms of COVID-19, and take recommended precautions to limit community spread after traveling from one location to another. Liu Y, Eggo RM, Kucharski AJ. Guidance from World Health Organization (WHO): Additional modeling by groups outside of CDC have produced similar findings that align with those presented above. Testing for the purpose of earlier discontinuation of quarantine should be considered only if it will have no impact on community diagnostic testing. However, for logistical reasons (e.g., rebooking of travel and avoiding potential exposures in airport terminals where social distancing may be challenging), CDC recommends departing air travelers get tested before they initiate travel, rather than at the airport immediately prior to their flight. This option maximally reduces risk of post-quarantine transmission risk and is the strategy with the greatest collective experience at present. This document lays out evidence to support two options to  shorten the quarantine period. Reducing the length of quarantine will reduce the burden and may increase community compliance. CDC will continue to closely monitor the evolving science for information that would warrant reconsideration of these recommendations. Crew members who have known exposure (i.e., close contacts) to a person with COVID-19 should be excluded from work until they meet criteria for release from quarantine. Any option to shorten quarantine risks being less effective than the currently recommended 14-day quarantine. Testing is being offered at a number of airports, both domestically and internationally, and many air travelers are choosing to get tested in airports because of convenience and ease of access. For practical purposes, the post-arrival testing period may be extended to 3-5 days after arrival at destination. risk of COVID-19 exposure and transmission; these areas should be separate from other facilities to the degrees possible (i.e., separate building, or designated rooms or floor with a separate entrance and minimal crossover with COVID-19 areas). The recommendation for a 14-day quarantine was based on estimates of the upper bounds of the COVID-19 incubation period. CDC is not responsible for Section 508 compliance (accessibility) on other federal or private website. these findings may guide mental health interventions and inform policy-maki … The optimal post-arrival test timing and reduction in risk of introducing additional cases of COVID-19 at destination (referred to as transmission risk in the remainder of this section) vary depending on what other measures are taken. Clifford S, Quilty BJ, Russell TW, et al. Individuals who travel may be at risk for exposure to SARS-CoV-2, the virus that causes COVID-19, before, during, or after travel. medRxiv. This could result in travelers’ spreading the virus to others at their destinations or upon returning home. Quarantine is intended to physically separate a person exposed to COVID-19 from others. CDC modeling suggests that, when combined with post-arrival testing and self-monitoring for symptoms of COVID-19 (with subsequent isolation for those who test positive or develop symptoms), the period of staying home or in a comparable location such as a hotel (referred to as stay-at-home period in the remainder of this section) can be shortened without substantially increasing the risk of introducing additional cases of COVID-19 to the destination community (Johansson et al). For instance, at Day 10 with symptom monitoring but without diagnostic testing, the estimated residual post-quarantine transmission risk was 1.4% (range 0.1%-10.6%). Guidance from the Centers for Disease Control and Prevention (CDC): Interim Guidance for Businesses and Employers to Plan and Respond to Coronavirus Disease 2019 (COVID-19), February 2020 Coronavirus Situation Summary. Subgroups less likely to adhere to CDC guidelines may benefit from targeted information campaigns. CDC has separate guidance for exposures in healthcare personnel and critical infrastructure workers, and for quarantine of contacts of persons with COVID-19. The COVID-19 pandemic has spread throughout the world. Travelers should follow guidance and requirements of destination countries for international travel, or state, territorial, tribal, and local authorities for U.S. domestic travel. CDC recognizes that any quarantine shorter than 14 days balances reduced burden against a small possibility of increasing the spread of the virus. Local public health authorities determine and establish the quarantine options for their jurisdictions. The Centers for Disease Control and Prevention has revised its guidelines for people who may have been exposed to the coronavirus. Wear a mask, stay at least 6 feet from others, wash your hands, avoid crowds, and take other steps to prevent the spread of COVID-19. All close contacts of a person who has tested positive for COVID-19 must stay home (self-quarantine) for 10 days from the time of their last exposure and continue to monitor themselves for symptoms for an additional 4 days. Follow-up with travelers may include contacting travelers, providing instructions for what travelers should do if they develop illness compatible with COVID-19, follow-up of test results, and intermittent check-ins during the post-arrival period. The Centers for Disease Control and Prevention (CDC) cannot attest to the accuracy of a non-federal website. The agency changed the definition after a … 1 Includes specimens positive at any laboratory and those confirmed by CDC confirmatory testing. Eurosurveillance. With this strategy, residual post-quarantine transmission risk is estimated to be about 1% with an upper limit of about 10%. The Centers for Disease Control and Prevention is set to shorten the recommended length of quarantine after exposure to someone who is positive for COVID … Quarantine’s importance grew after it was evident that persons are able to transmit SARS-CoV-2 before symptoms develop, and that a substantial portion of infected persons (likely somewhere between 20% to 40%1) never develop symptomatic illness but can still transmit the virus. 2020; 2020.07.24.20161281. doi:10.1101/2020.07.24.20161281, Ashcroft P, Lehtinen S, Angst DC, Low N, Bonhoeffer S. Quantifying the impact of quarantine duration on COVID-19 transmission. With a stay-at-home period for 14 days after travel (i.e., with or without testing), the transmission risk can be almost eliminated. CDC modeling indicates that predeparture testing is most effective when combined with self-monitoring (Johansson et al). However, with the addition of diagnostic testing of a specimen collected up to 48 hours before Day 10, the estimated post-quarantine transmission risk was reduced to 0.3% (range 0.0%-2.4%) for RT-PCR testing, and 1.1% (0.1%-9.5%) for antigen testing with a test that had a diagnostic sensitivity of 70%. Follow-up with travelers is at the discretion of health departments and may be considered by jurisdictions that are implementing containment measures. Testing sites should also have plans to manage individuals who test positive and their travel companions, including temporary isolation or quarantine and safe private transportation home that does not involve public transportation. medRxiv. mitigating strategies). For international transport with a destination within the United States, per CDC regulations (42 Code of Federal Regulations, Part 71: Foreign Quarantineexternal icon), the conveyance operator must notify CDC in advance through the CDC quarantine station with jurisdiction for the port of entry or the CDC Emergency Operations Center (770-488-7100 or eocreport@cdc.gov). Testing does not eliminate all risk, but when predeparture testing is combined with self-monitoring for symptoms of COVID-19, wearing masks, social distancing, and hand hygiene, it can make travel safer by reducing spread on conveyances and in transportation hubs. Modeled estimates of post-quarantine transmission risk quarantine duration. Before recognized widespread transmission in the United States, CDC recommended an aggressive approach to identifying exposed HCP and included recommendations for restricting some … Day 0 was defined as the day of infection*. At present, collection of traveler contact information is occurring for passengers from countries subject to entry restrictions under Presidential Proclamation. If a 14-day quarantine just isn't feasible for you after a possible COVID-19 exposure, new Centers for Disease Control and Prevention (CDC) quarantine guidelines say you may be … Mathematical models have provided some insights to potential impacts of testing and various quarantine periods. At community prevalences of 1%, 3% and 5%, the post-quarantine transmission risk at Day 7 of quarantine were 0.25%, 0.84%, and 1.38%, respectively, with a diagnostic test that had 90% sensitivity. Previous language defined a … Protect yourself and others. 2 Includes specimens tested at the NH Public Health Laboratories (PHL), LabCorp, Quest, Dartmouth-Hitchcock Medical Center, Mako, certain hospital laboratories, the University of New Hampshire and their contracted laboratory, and … Published data were applied to model residual post-quarantine transmission risk using  RT-PCR3,4; for antigen testing, a diagnostic sensitivity of 70% was applied. To receive email updates about COVID-19, enter your email address: Public Health Guidance for Potential COVID-19 Exposure Associated with Travel, Centers for Disease Control and Prevention. Effectiveness of airport screening at detecting travellers infected with novel coronavirus (2019-nCoV). Dr. Henry Walke, incident manager for the CDC’s COVID-19 response, said people should still … New CDC guidelines recommend that close contacts of people infected with the new coronavirus should quarantine for seven to 10 days after exposure, down … Bottom line: New CDC guidance says even intermittent exposure to a person infected with Covid-19 – adding up to 15 minutes – can result in transmission of the coronavirus. Response Leadership, How COVID-19 Burials are Different from Ebola Burials, Science Agenda: Building the Evidence Base for Ongoing COVID-19 Response, 2020-2023, Scientific Brief: Community Use of Cloth Masks to Control the Spread of SARS-CoV-2, Scientific Brief: SARS-CoV-2 and Potential Airborne Transmission, U.S. Department of Health & Human Services. Predeparture testing may detect travelers infected with SARS-CoV-2 before they initiate their travel. Quarantine and testing strategies in contact tracing for SARS-CoV-2: a modelling study. Results are shown in the Figure and Table. CDC COVID-19 Death Data and Reporting Guidance; CDC Clinical Questions about COVID-19: Questions and Answers; Persons Under Investigation. Options for travelers with known exposure to someone with COVID-19 are private vehicle or private air charter with precautions in place to protect air crews. “Cumulative exposures can be as hazardous as 15 sustained continuous minutes of exposure,” Dr. William Schaffner, an infectious disease expert, … Official: CDC to shorten guidance for quarantining after COVID-19 exposure to 10 days, 7 with a negative test. Stay-at-home Period with or without Post-arrival Testing, Predeparture Testing and Post-arrival Testing with No Stay-at-home Period, Post-arrival Testing Alone with No Stay-at-home Period, Predeparture Testing with No Post-arrival Management (other than symptom monitoring), Johansson MA, Wolford H, Paul P, et al. A stay-at-home period of 7-10 days without testing provides a greater reduction in risk than post-arrival testing alone, regardless of when the testing occurs. Persons can continue to be quarantined for 14 days without testing per existing recommendations. The CDC said a 14-day quarantine is the “best way to reduce the risk of spreading Covid-19.” Dr. Henry Walke, the agency’s Covid-19 incident manager, said the decision can help make people deal with economic hardship, according to CNBC. Americans have high COVID-19 stress exposure and some demographic subgroups appear particularly vulnerable to stress effects. 2020; 2020.09.24.20201061. doi:10.1101/2020.09.24.20201061, Quilty BJ, Clifford S, Group2 C nCoV working, Flasche S, Eggo RM. Travel should also be coordinated with public health authorities at traveler’s intended destination. These estimates assume that when diagnostic testing was performed, results were available after the diagnostic specimen’s collection and before the end of quarantine. These are also summarized here. To achieve this level of risk reduction, the 7-day period should be completed even if the test is negative. Technical Considerations on Testing and Post-arrival Management (based on CDC modeling). Added section for Individuals with Confirmed or Probable COVID-19 or Known Exposure to Someone with COVID-19. 2020;25: 2000080. doi:10.2807/1560-7917.ES.2020.25.5.2000080, Wells CR, Townsend JP, Pandey A, Krieger G, Singer B, McDonald RH, et al. Cruise ships in U.S. waters or intending to return to U.S. waters must continue to follow CDC’s Framework for Conditional Sailing Order (CSO) and the Technical Instructions for Mitigation of COVID-19 Among Cruise Ship Crew. The Centers for Disease Control and Prevention announced new quarantine guidelines for people who were exposed to coronavirus, reducing the length of time from 14 days to … However, a 14-day quarantine can impose personal burdens that may affect physical and mental health as well as cause economic hardship that may reduce compliance. The CDC has issued specific guidelines for returning to work, including after recovering from COVID-19 or having exposure to someone who has COVID-19, for certain … The combination of predeparture and post-arrival testing provides additional risk reduction over either predeparture or post-arrival testing alone, with a moderate reduction in transmission risk at destination. All Information on the Coronavirus Covid-19 in New Hampshire. Reducing travel-related SARS-CoV-2 transmission with layered mitigation measures: Symptom monitoring, quarantine, and testing. Regardless of the stay-at-home period, travelers should also take precautions to prevent transmission within their households, including mask wearing including in shared spaces within households, by both travelers and nontravelers, when only some people traveled. CDC To Adjust 14-Day Quarantine Guidelines To 10 For COVID Exposure. Travelers with greater potential risk of exposure because of the circumstances of their travel (e.g., travel from a country with a level 2, 3 or 4 travel health notice), or activities during travel are recommended to take additional precautions during the 14 days after travel. Combined with a 7-day stay-at-home period, testing at 3-4 days post-arrival is optimal and provides a comparable reduction in transmission risk to a 14-day stay-at-home period. Maintain Healthy Business Operations. Quarantine helps prevent spread of disease that can occur before a person knows they have the virus. Optimal COVID-19 quarantine and testing strategies. If travel is necessary (e.g., for repatriation or to obtain medical care that is not available locally), transportation should be conducted in a manner that does not expose conveyance operators (e.g., air crews, bus drivers) or other travelers. Does ASHRAE’s guidance agree with guidance from WHO and CDC? The CDC defines close contact as 15 minutes total spent 6 feet or closer to an infected person. Travelers whose test results are not available before departure should delay their travel until results are available. Such travelers are likely to experience their entire infectious period in the destination location and, therefore, pose the highest transmission risk at destination. The Centers for Disease Control and Prevention (CDC) cannot attest to the accuracy of a non-federal website. The light blue bars indicate the daily post-quarantine transmission risk if there is no clinical evidence of COVID-19 elicited during daily symptom monitoring. Wear a mask, wash hands often, stay 6 ft from others. Strategies to reduce the risk of SARS-CoV-2 re-introduction from international travellers. Duration of quarantine and post-test risk of infection among individuals exposed to SARS-CoV-2. However, based on local circumstances and resources, the following options to shorten quarantine are acceptable alternatives. If they develop fever, cough, shortness of breath, or other symptoms of COVID-19, crew members should self-isolate and be excluded from work on commercial flights until cleared to work by their employer’s occupational health program following CDC’s criteria for Discontinuation of Isolation for Persons with COVID-19 Not in Healthcare Settings. Reducing travel-related SARS-CoV-2 transmission with layered mitigation measures: symptom monitoring, quarantine, and testing. The CDC's early definition of a close contact—initially defined as being closer than 6 feet to a person with COVID for 15 minutes or more—is simply not a stringent enough guideline. Note: These considerations are specifically intended for management of asymptomatic travelers with no known exposures to a person with COVID-19. Saving Lives, Protecting People, steps to prevent spread of infection within the household, https://doi.org/10.1101/2020.11.23.20237412, https://doi.org/10.1101/2020.07.24.20161281, https://doi.org/10.1101/2020.08.21.20177808, https://doi.org/10.1101/2020.10.27.20211631, https://www.ncbi.nlm.nih.gov/pubmed/32113505, https://www.ncbi.nlm.nih.gov/pubmed/33152271, https://www.ncbi.nlm.nih.gov/pubmed/33151916, National Center for Immunization and Respiratory Diseases (NCIRD), Raising Defenses against the COVID-19 "Tsunami", COVID-19 Pandemic Complicates Other Disasters, For COVID-19 Clues, Researchers Look to the Sewer, Dispatches from the Data Jungle of COVID-19, A “capital” assignment for CDC lab specialist, COVID-19 Response is a Family Affair for EIS Alums, “Excess Death” Data Point to Pandemic’s True Toll, How to mitigate COVID-19 transmission in densely populated areas globally, Providing Spiritual and Psychosocial Support, Maternal, Neonatal, and Child Health Services During COVID-19, Maternal, Neonatal, and Child Health Surveillance During COVID-19, Sharing and Shifting Tasks to Maintain Essential Healthcare, Community Health Workers Support of Home-based Care, Operational Considerations for Community Isolation Centers, Operational Considerations for Humanitarian Settings, Operational Considerations for Immunization Services, COVID-19 Rapid Assessment of Point of Entry Capacity (RAPC), Assessing and Managing Individual-Level Risk of COVID-19 Exposure in Mobile Populations, Maintaining Essential Services for & Providing Maternal, Newborn, & Child Healthcare, Information Metrics for Non.-U.S. Be completed even if the test result were positive are provided below and Prevention announced it will no! 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( i.e., individuals should self-isolate ) if symptoms develop or cdc covid exposure guidelines pre-departure test result positive! Conduct monitoring of travelers are based on estimates of the virus to at. Evidence of COVID-19 to destination communities is occurring for passengers from countries subject to the novel coronavirus, reports. Indicates that predeparture testing may detect travelers infected with SARS-CoV-2 before they initiate travel!, et al travelers is at the discretion of health departments and may develop illness from. To adhere to CDC guidelines may benefit from targeted information campaigns have provided some to!, stay 6 ft from others also be coordinated with public health management of asymptomatic with. If it will have no impact on community diagnostic testing doi:10.1101/2020.09.24.20201061, Quilty,! Purposes, the model assumed that the diagnostic specimen would be collected up 48... 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