Does getting the flu shot increase herd immunity? should young, healthy people get it? i thought it was supposed to be for young children, pregnant women, and elderly people...? the "at-risk" population?

Flu shot: Everyone should get an annual flu shot. Herd immunity increases the more people are vaccinated. This prevents diseases from spreading. While pregnant women, infants and the elderly are at higher risk of death from flu no one can be certain they won’t be a victim. Protect your self and others by getting vaccinated.

Influenza Vaccine: Vaccines against Influenza and other infectious disease can help to provide herd immunity (when most people in a community are immune & it indirectly protects those who are not immune). The Flu shot is for most people.