Physicians who care for adults generally don't think about vaccines as much as pediatricians do, and adults think of vaccines as a kid thing.

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

Today, however, anti-vaccine activists go out of their way to claim that they are not anti-vaccine; they’re pro-vaccine. They just want vaccines to be safer. This is a much softer, less radical, more tolerable message, allowing them greater access to the media. However, because anti-vaccine activists today define safe as free from side effects such as autism, learning disabilities, attention deficit disorder, multiple sclerosis, diabetes, strokes, heart attacks, and blood clots—conditions that aren’t caused by vaccines—safer vaccines, using their definition, can never be made.

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.

Your child can die from chickenpox.

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.

Pertussis is a disease that adolescents and adults give to children.