There are a variety of vaccines available to prevent infectious diseases. When a person receives a vaccine, they typically produce antibodies. 1. Why don't the antibodies produced by a person receiving a vaccine against one infectious agent (like hepatitis A virus) protect that person from a different infectious agent (like
measles virus)? Make sure your answer is specific and detailed!
2. Many vaccines, like the one against measles virus, only need to be given a few times to a person during their lifetime. Why do people need to receive a vaccine against influenza
virus (a flu shot) every year? Again, make sure your answer is specific and detailed.