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The US Food and Drug Administration on Thursday issued recommendations for the composition of influenza shots for the upcoming respiratory virus season, but without input from its independent vaccine advisers. The FDA’s Vaccines and Related Biological Products Advisory Committee had been scheduled to meet Thursday to weigh in on the composition of the flu shots, but that session was canceled without explanation in late February. (Dillinger and Goodman, 3/13)

The Vermont Department of Health has said a school-aged child in Lamoille County is confirmed to have measles, the first case in 2025. “The child became sick after returning with their family from traveling internationally in recent days,” the department said in a statement. “The risk to the public is believed to be low, as the child has been isolated from most community settings while they have been contagious. Investigation is ongoing.” (Soucheray, 3/13)

Infants are at higher risk of complications from the measles but can’t be vaccinated right away. (Pearson, 3/14)

As new cases are reported, our maps and illustrations show the spread of the virus and how infections can run through a community. (Corum and Rosenbluth, 3/13)

In the past year, over 135 million passengers traveled to the U.S. from other countries. To infectious disease experts, that represents 135 million chances for an outbreak to begin. To identify and stop the next potential pandemic, government disease detectives have been discreetly searching for viral pathogens in wastewater from airplanes. Experts are worried that these efforts may not be enough. The CDC's Traveler Genomic Surveillance Program tests wastewater from airplanes, looking for pathogens that may have hitched a ride with passengers on long-haul international flights. (Cauchi and Gounder, 3/13)