epidemiology

Cohen, who was not involved in this study, is deputy director and associate professor of medicine and epidemiology in the Perelman School of Medicine at the University of Pennsylvania.

“Right now we should really be trying to up vaccination rates,” Mathew Kiang, an assistant professor of epidemiology and population health, told The Times in April.

But she offered Hertz-Picciotto her experience in genetics and epidemiology as well as the considerable resources of her agency.

"While some of these individual actions are important, they are a drop in the ocean in the larger context of chronic disease," argues Nicola Hawley, professor of epidemiology at Yale School of Public Health.

Examining vaccines licensed seven or more years ago raises concerns, because it suggests the process to approve them was flawed, said Bill Hanage, a professor of epidemiology at Harvard TH Chan School of Public Health.