Pneumococcus is a fairly common cause of pneumonia and [raises the] risk of death in older adults.

Pneumococcus is a fairly common cause of pneumonia and [raises the] risk of death in older adults.

One bacterium has 2,000 to 6,000 proteins.

Your child can die from chickenpox.

I've never seen this level of anger at parents who've chosen not to vaccinate their children.

When you're in the womb, you're in a sterile environment. When you enter the birth canal and the world, you're not. Very quickly, you have, living on the surface of your body, trillions of bacteria, literally trillion.

What really reinvigorated vaccines was Prevnar, the pneumococcal vaccine that prevents against meningitis and ear infections. Here was the first vaccine to cross the billion-dollar mark.