Question

what are vaccines? how does a vaccine work?​

Answer 1

Answer:

Vaccines give you immunity to a disease without you getting sick first. They are made using killed or weakened versions of the disease-causing germ or parts of the germ (called antigens). For some vaccines, genetic engineering is used to make the antigens used in the vaccine.

Answer 2

Answer:

vaccines

vaccines are preparation of weakened or killed disease causing microorganisms....

vaccine protects us from disease