Question: How do Vacitations protect you against the disease? What happens inside your body ?

Christina Pagel answered on 18 Jun 2013:

When you get a disease normally, your body fights back by producing what are called antibodies – these are cells in your blood that latch onto the invading disease cells and disable them.

Vaccinations work by injecting cells that are like the disease cells but don’t actually cause the disease. Your body makes the antibodies anyway and then if you ever come into contact with the real disease cells, your body already knows how to fight it off with the antibodies it made against the pretend disease in the vaccine!

Sometimes you need to get more than one vaccination because your body forgets how to make the antibodies after a while.