Vaccine controversies

Vaccines are special medicines that help keep people from getting sick. They are made from very small pieces of bacteria or viruses that are made safe, so when the medicine enters your body, your body builds up protection to those germs without getting sick. Vaccine controversies usually involve people who are worried about the safety or effectiveness of vaccines and some people who don't think that vaccines are necessary. Vaccines are a very important way to keep us healthy, so it's important to learn as much as you can about them.