Vaccination will prevent some diseases, what is the mechanism of vaccine?

Inactivated vaccines are made from immunogenic pathogenic microorganisms that have been cultured, inactivated by physical or chemical methods, and then purified. The inactivated vaccine has lost its infectivity to the organism, but still maintains its immunogenicity, which can stimulate the organism to produce the corresponding immunity to resist infection by wild strains. The live attenuated vaccine is a vaccine made by using artificial directed mutation methods or screening out live microorganisms (antigens) from nature that are highly attenuated or basically non-toxic. The live attenuated vaccine has the ability to grow and multiply in the body, and can cause the body to react like a hidden infection or a mild infection, but does not produce clinical symptoms, the immune effect is strong and long-lasting, usually only need to be vaccinated once, and the dosage is small, in addition to stimulating the body to produce cellular immunity and humoral immunity, but also can produce local immune protection. None of the components of the vaccine will affect the chromosomes of human germ cells or jeopardize human beings at the genetic level.

Vaccines don't always work

This statement is true. However, no one has ever claimed that vaccines always work. Most vaccines provide 80-95% protection. This means that if 100 vaccinated people are in a situation where they are infected with a disease, 5-20 will become infected. This is already much better than everyone getting infected. This high percentage of protection ensures that certain diseases do not spread widely in the population. Also, if a vaccinated child contracts a disease, it will be much milder than if the child had not been vaccinated.

What to do if you forget your vaccinations

Most vaccinations don't need to be revisited as long as the recommended dose is given quickly. As for how to schedule a refill, you should consult your physician.

Some parents are concerned that their children's bodies may not be able to cope with multiple vaccinations at the same time. In fact, there are regulations that govern which vaccinations can be given at the same time, and when they can be given in between.