Question

what are vaccines and how are they prepared?

Answer 1

actually vaccines are the dead of mostly not very strong and very less amount of the disease bacteria


it is injected in our body to teach our immune system how to fight that specific bacteria or disease


as body defence system fights back and gains the idea of the the defending so it can do the same thing whenever the body is under attack ....


do mark as the brainliest...

Answer 2

Vaccines are a preparation of weakened or killed pathogens that are administered to person. Since, these pathogens are killed/weakened they are not able to harm the person(immune system fights pathogens). They are helpful because immune system gains information about the particular type of pathogen (used in vaccine) and next time these pathogens attack the human body the immune system easily overcomes the pathogens.