Describe what a vaccine is made of and how it prevent infection.

Vaccines are made of mixtures that contain either parts of pathogens or whole pathogens that prepare the body's defenses to fight against the pathogens.
When we injected vaccines to our body, it will enhance our immune system to handle a specific type of pathogen that enters our body so we don't get contaminated.

A vaccine is a substance that helps protect against a particular infection. The body fights infections using the immune system. Each vaccine contains a small amount of the disease germ (virus or bacteria) or parts of the germ. For examples are the measles virus and pertussis (whooping cough) bacteria.

Most vaccines are given through injections, but some can be given by nose or mouth

Further explanation  Vaccine that use a weakened form of the germ that causes a disease. These vaccines are used to protect against MMR, chickenpox, and rotavirus. Inactivated vaccines use killed version of the germs that causes a disease. This vaccine is used to protect against Polio, and Hepatitis A.  Subunit, recombinant, polysaccharide, and conjugate vaccines these vaccines use only specific pieces of the germ, These vaccines are used to protect against HPV, meningococcal disease, and pneumococcal diseases.Toxoid vaccines, this vaccine use a toxin (harmful product) made by the germ that causes a disease. These vaccines are used to protect against diphtheria and tetanus. Learning more  

•Type of vaccines  

•Vaccination  

•HPV Vaccine  

Keywords: vaccines, infection, type of vaccines  

Ibelieve it would be d (side effect) sorry if i'm wrong(: