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Measles on the Move: CDC Warns Travelers of In-Flight Transmission
The CDC is sounding the alarm on the risk of measles transmission during travel, following dozens of cases this year involving infectious passengers on U.S. flights. The agency has updated its travel advisory, cautioning that measles can spread in various travel settings, from airports and train stations to tourist hotspots and crowded events.
So far this year, the CDC has received at least 62 reports of contagious travelers on domestic and international flights. Investigations into 50 of these cases confirmed at least one instance of in-flight transmission, typically occurring between nearby passengers. Airports also present a challenge, with potential exposures more difficult to track due to the transient nature of travelers.
Acknowledging the persistent global threat of measles, the CDC has broadened its travel advisory beyond specific countries. The agency now emphasizes that measles is an ongoing worldwide risk, with more international travelers becoming infected. This update comes amidst record-high measles cases in the U.S. this year, coupled with significant outbreaks in neighboring Mexico and Canada.
Reflecting the elevated risk, the CDC now advises travelers to consider postponing trips if not fully vaccinated against measles, strengthening its previous recommendation to merely “consider alternative plans.” All international travelers are urged to ensure they are fully vaccinated. The CDC also recently updated its guidance for doctors, recommending additional measles vaccinations for some domestic travelers.
These developments coincide with a concerning resurgence in measles cases nationwide. With at least 1,088 cases reported so far this year, including first-time occurrences in Iowa and Nebraska, the CDC’s data suggests a recent acceleration in the spread.
While approximately 90% of cases are linked to domestic outbreaks, travel remains a significant concern for further transmission. Although the major Southwest outbreak appears to be slowing, health officials remain vigilant, particularly given the increased travel during this time of year.
They warn that travel could reignite the spread of measles and urge continued caution.