Vaccination is a process of injecting a dead or weakened form of a germ into the body. how does this strengthen the immune system?

Vaccinations contain an attenuated (broken down) part or piece of a pathogen that is capable of causing a certain disease. The memory cells on the body can remember the antigen present on the cell membranes of the disease and prepare the antibodies to fight any foreign material that has that specific antigen. So, in simpler words, they help stimulate the body against specific diseases.

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Six amino acids have side chains that are polar but not charged. these are serine (ser), threonine (thr), cysteine (cys), asparagine (asn), glutamine (gln), and tyrosine (tyr). these amino acids are usually found at the surface of proteins, as discussed in the proteins 2 module.

This is giving me a headache i have asked others and they don’t know it either