Vaccine policy in the U.S. is entering uncharted territory
A key advisory group vows to base decisions on evidence, boost confidence in vaccines and protect health. Experts fear the opposite is happening.
Author: Tina Hesman Saey
Many U.S. babies may lack gut bacteria that train their immune systems
Too little Bifidobacterium, used to digest breast milk, in babies’ gut microbiomes can increase their risk of developing allergies and asthma.