What does a vaccine booster mean?

Vaccines are a method of preventing infectious diseases by injecting the body's immune system to generate corresponding antibodies so that it can respond quickly when it encounters a pathogen. A vaccine booster, on the other hand, is a supplemental vaccination for people who have already received the vaccine. Since the protective effect of vaccines is limited and the body's immunity declines over time, regular booster shots are needed to maintain the protective effect of vaccines.

There are two main reasons why vaccine booster shots are needed. The first is that some viruses mutate quickly, and the original vaccine may no longer be effective against new strains. The second reason is that immunization against many diseases does not last long, such as hepatitis B vaccine, which only protects for about seven years, and rabies vaccine, which requires yearly vaccinations. So vaccine boosters can help the body maintain its immune status and keep us safe from the threat of disease.

Adaptable people and precautions for vaccine booster shots

Vaccine booster shots are usually applied to two groups of people: those who have received the original batch of vaccine injections, and now need to have supplementary vaccinations to maintain their immune status; and those who have not been vaccinated for the past few years, and need to have their first vaccinations. However, before receiving a vaccine booster, you should consult your doctor and know your health condition so that you can make a reasonable vaccination plan according to your personal situation. At the same time, if there is an allergic reaction or viral infection, etc., the vaccination should be canceled until the body recovers health.