With a 97% effective vaccine, 3% of children rely on ‘halos’ of herd immunity protection, clinicians say. Declining ...

Using the WHO (65%) and CDC (0.65%) figures, 213 million people in the U.S. would need to be infected to achieve herd immunity, leaving 1,385,800 Americans dead. Stress on the nation's hospitals ...

Although a flu shot doesn’t guarantee one won’t catch the flu, the vaccine still counts as one of the most effective ...