We need vaccination to fight ________ disease.

Vaccines work against ________.

Bacteria is a ________ noun.

Viruses are way smaller than bacteria.

Injected vaccines ________ in our body to build our immune system and fight the real viruses.

Edward Jenner is the one who ________ vaccine.

The first human ever who got vaccinated is ________.

________ didn't catch small pox because they had cow pox that made them immune.

The word vaccine originally comes from the word vacca that means ________.

A recently vaccinated person could get a little bit sick from the vaccine itself but it's not lethal [not deadly].

Small pox is more dangerous and lethal than cow pox.