Attenuated Vaccines

Attenuated vaccines are vaccines that use a weakened version of a virus or bacteria to stimulate the immune system and build a protective immune response against the pathogen. They are some of the most effective types of vaccines and are responsible for the elimination of numerous infectious diseases, including polio, smallpox, and measles. Attenuated vaccines are especially useful because they can induce lifelong immunity, with a single dose providing protection against the virus or bacteria for years. Additionally, they are relatively inexpensive and easy to produce in large quantities.