People are reticent to give a newborn the hepatitis B vaccine and often delay it.

The flu can definitely set you up for bacterial pneumonias.

For most mothers, vaccinations become a matter of faith - faith in pharmaceutical companies, faith in public health officials - and I think there's been an erosion of faith.

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.

Vaccines are not traditionally big money makers. They're given once or a few times in one's life, so they're never going to be blockbusters.

People are reticent to give a newborn the hepatitis B vaccine and often delay it.

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