Over the years, vaccines have prevented countless diseases and saved human lives. Vaccines are necessary for everyone- Infants, children, adolescents, teens, and adults, and you need to get the necessary ones depending on your age, location, job, lifestyle, travel schedule, health conditions, and more.
People with several underlying health conditions like HIV have weak immune systems and cannot get vaccinated with certain vaccines. But people with the ability to get vaccinated can help these people stay protected by getting the necessary vaccines.
More the others are vaccinated, less likely those who cannot get vaccine are protected.