Skip to content
Advertisement

Biologist Rebecca Gillespie holds a vial of flu-fighting antibodies at the Vaccine Research Center at the National Institutes of Health, Tuesday, Dec. 19, 2017, in Bethesda, Md. Despite 100 years of science, the flu virus too often beats our best defenses because it constantly mutates. (AP Photo/Carolyn Kaster) **FILE**

Biologist Rebecca Gillespie holds a vial of flu-fighting antibodies at the Vaccine Research Center at the National Institutes of Health, Tuesday, Dec. 19, 2017, in Bethesda, Md. Despite 100 years of science, the flu virus too often beats our best defenses because it constantly mutates. (AP Photo/Carolyn Kaster) **FILE**

Featured Photo Galleries