A panel of advisers to the Centers for Disease Control and Prevention recommended against using a needle-free flu vaccine that's popular with pediatricians, parents and children.
Seizures caused by fever are frightening, even though they don't harm long term. And a few vaccines do slightly raise the risk of a febrile seizure. But not being vaccinated poses a greater risk.
Babies are much less likely to get the flu in their first months of life if mom got a flu shot while she was pregnant, a study finds. Yet most expectant mothers don't get immunized.
Public anger in China is simmering over a nationwide criminal ring that sold expired vaccines. Despite success in vaccinating China's population, lax oversight has often led to tragedies like this.
155 countries and territories are switching to a different polio vaccine, in what health officials say is the next step to completely eradicating the disease worldwide.
There's no vaccine yet, but Zika researchers are racing to find a good candidate. After testing it in animals, checking for effectiveness in humans might include injecting Zika into healthy people.
An HPV vaccine that protects against nine strains of the virus that causes cancer gets the nod from the CDC. So does a vaccine for a rare but often lethal form of meningitis.
Our experience with the rubella virus, which can cause miscarriages or serious birth defects if a woman gets infected while pregnant, may help scientists figure out how to combat Zika virus.
State health officials suspect California's big measles outbreak last year helped persuade parents to get their kids immunized against other illnesses, too.