Try to describe the types of viral vaccines available and their advantages and disadvantages?

There are three types of vaccines: live bacterial vaccine, dead bacterial vaccine and toxoid. With the following characteristics.

(1) Live bacterial vaccines

Live attenuated vaccines are used as vaccines. Such as polio, poliomyelitis, measles, BCG (BCG) and other vaccines are.

When you receive a live vaccine, a slight infection occurs, and the resistance of both the blood and the cells increases. The immunity lasts for a long time,

so there is no need for several additional immunizations.

(2) Inactivated bacterial vaccines

Kill the pathogen, leaving only the toxin that produces immunity as the vaccine. Such as whooping cough, encephalitis B, influenza and other epidemics

vaccines are all.

Vaccination with inactivated bacteria creates antibodies in the blood to kill invading pathogens.

Inactivated bacterial vaccines cannot multiply in the body like live vaccines, so additional vaccinations must be given frequently to strengthen immunity.

(3) Toxoid

The toxin of the pathogen is removed and weakened to become non-toxic.

When a person is inoculated with a toxoid, a substance is produced in the blood to make the toxin in the bacteria non-toxic, which can be used to prevent disease.

This is the case with diphtheria and tetanus vaccines. However, like inactivated bacterial vaccines, they do not have staying power, so additional vaccinations must be given frequently

.