Be sure to give the airline your current contact information when booking your ticket so you can be notified if you are exposed to a sick traveler on a flight.

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Under current federal regulations, pilots must report all illnesses and deaths to CDC before arriving to a U.S. destination. According to CDC protocols, if a sick traveler has a contagious disease that is a risk to others on board the airplane, CDC works with local and state health departments and international public health agencies to contact exposed passengers and crew.

For more information, see the CDC webpage Protecting Travelers’ Health from Airport to Community: Investigating Contagious Diseases on Flights.

Yes. Air travel requires spending time in security lines and airport terminals, which can bring you in close contact with other people and frequently touched surfaces. Most viruses and other germs do not spread easily on flights because of how air circulates and is filtered on airplanes. However, social distancing is difficult on crowded flights, and you may have to sit near others (within 6 feet), sometimes for hours. This may increase your risk for exposure to the virus that causes COVID-19.

Fully vaccinated travelers do not need to self-quarantine in the United States following international travel.

We conclude that the risk for on-board transmission of SARS-CoV-2 during long flights is real and has the potential to cause COVID-19 clusters of substantial size, even in business class–like settings with spacious seating arrangements well beyond the established distance used to define close contact on airplanes.As long as COVID-19 presents a global pandemic threat in the absence of a good point-of-care test, better on-board infection prevention measures and arrival screening procedures are needed to make flying safe.

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Tobacco smoking is a known risk factor for many respiratory infections and increases the severity of respiratory diseases. A review of studies by public health experts convened by WHO on 29 April 2020 found that smokers are more likely to develop severe disease with COVID-19, compared to non-smokers.

Physical activity and relaxation techniques can be valuable tools to help you remain calm and continue to protect your health during this time. WHO recommends 150 minutes of moderate-intensity or 75 minutes of vigorous-intensity physical activity per week, or a combination of both.

The official names COVID-19 and SARS-CoV-2 were issued by the WHO on 11 February 2020.

The COVID-19 virus has not been detected in drinking-water supplies, and based on current evidence, the risk to water supplies is low.