Airborne Transmission of Highly Contagious Disease Prompts CDC to Advise Against Air Travel
The Centers for Disease Control and Prevention (CDC) has issued a travel advisory, urging unvaccinated Americans to cancel upcoming flights over concerns about measles spreading on U.S. aircraft.
The health agency has elevated its travel health notice to the highest level, warning that the highly contagious virus is spread through air travel. Previous recommendations to consider altering travel plans if unvaccinated are now being replaced with advice to postpone trips, as approximately 10% of adults may lack immunity, either due to never receiving the measles, mumps, and rubella (MMR) vaccine or due to diminished immunity over time.
This substantial group, equating to around 25 million U.S. adults, could be at risk of contracting measles without immunization. Throughout this year, measles infections have been detected at major U.S. airports, contributing to a resurgence of the virus and its transmission during flights.
The CDC has confirmed at least one case where measles was spread during air travel upon investigating dozens of passengers who were contagious while flying. To prevent further outbreaks, all U.S. travelers are now being recommended to be fully vaccinated against measles for all international trips.
In addition, doctors are suggested to provide additional measles vaccinations to domestic travelers heading to Texas, where over 700 cases have occurred this year. Moreover, the CDC warns that travelers can catch measles in numerous travel settings, including airports, airplanes, tourist attractions, and large, crowded events.
Recent reports have shown that since the start of 2023, the CDC has received 62 cases of travelers infectious with measles while entering or traveling within the U.S. Following an investigation of 50 of these passengers, measles has been verified to have spread during air travel in at least one instance, typically when infectious individuals are seated next to each other.
During a related development, three passengers on the same Turkish Airlines flight tested positive for measles upon arrival at Denver International Airport. Notably, one of the infected individuals was vaccinated. As of 2025, precise data on the number of unvaccinated U.S. adults for measles is limited.
The CDC provides the following suggestions for preventing measles transmission:
- Ensure you and your family are up-to-date on the MMR vaccine.
- Avoid traveling if you have been exposed to measles or are unvaccinated.
- Wash your hands frequently and cover your cough or sneeze using a tissue or your elbow.
- Avoid close contact with others, especially unvaccinated people, if you have symptoms consistent with measles.
By following these precautions, travelers can help reduce the risk of measles transmission during travel. For more detailed information on measles and travel updates, visit the CDC's website.
- The CDC has issued a travel advisory, urging unvaccinated individuals to reconsider their plans for future flights due to measles concerns.
- The highly contagious virus is known to spread through air travel, leading to a heightened travel health notice from the CDC.
- Approximately 10% of adults in the U.S., equating to around 25 million, may lack immunity and could be at risk of contracting measles without immunization.
- This year, measles infections have been detected at major U.S. airports, causing a resurgence of the virus and its transmission during flights.
- The CDC has confirmed at least one case where measles was spread during air travel after investigating dozens of passengers who were contagious while flying.
- To prevent further outbreaks, the CDC now recommends that all U.S. travelers be fully vaccinated against measles for all international trips.
- Additionally, doctors are suggested to provide additional measles vaccinations to domestic travelers heading to Texas, where a significant number of cases have occurred this year.
- Travelers should be aware that measles can be contracted in a variety of travel settings, including airports, airplanes, tourist attractions, and large, crowded events.
- Since the start of 2023, the CDC has received 62 cases of travelers infectious with measles while entering or traveling within the U.S.
- In at least one instance, measles has been verified to have spread during air travel when infectious individuals were seated next to each other.
- Recently, three passengers on the same Turkish Airlines flight tested positive for measles upon arrival at Denver International Airport.
- Notably, one of the infected individuals was vaccinated, demonstrating the potential for vaccinated individuals to still contract the virus.
- The CDC's website provides detailed information on measles and offers updates on travel advisories.
- To prevent measles transmission, it is recommended to ensure you and your family are up-to-date on the MMR vaccine.
- If you have been exposed to measles or are unvaccinated, it's best to avoid traveling.
- Frequent hand-washing and covering your cough or sneeze using a tissue or your elbow are also effective measures to prevent the spread of measles.
- It's advisable to avoid close contact with others, especially unvaccinated people, if you have symptoms consistent with measles.
- Beyond measles, other health issues must be considered when traveling, such as chronic diseases, cancer, respiratory conditions, digestive health, eye health, hearing, health and wellness, fitness and exercise, sexual health, autoimmune disorders, and skin care.
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