Purely by chance, thousands of vaccinated people will have heart attacks, strokes and other illnesses shortly after the injections. Sorting out whether the vaccines had anything to do with their ailments will be a thorny problem, requiring a vast, coordinated effort by state and federal agencies, hospitals, drug makers and insurers to discern patterns in a flood of data. Findings will need to be clearly communicated to a distrustful public swamped with disinformation…

“We’re behind the eight ball,” said Daniel Salmon, who served as the director of vaccine safety in that office from 2007 to 2012, overseeing coordination during the H1N1 flu pandemic in 2009. ”We don’t even know who’s in charge.”

An H.H.S. spokesperson said that the vaccine office was not shuttered. “The office was not ‘closed,’ but was merged with the Office of Infectious Disease and HIV/AIDS Policy and was strengthened,” the spokesperson said in a statement. “All the functions continue in this new organizational structure.”

In a brief statement, a different spokesperson said that Operation Warp Speed was working closely with the Centers for Disease Control and Prevention “to synchronize the IT systems” involved in monitoring vaccine safety data.