Answer:
<h2>Demographic measures are the actual changes in size, composition and distribution due to changes in demographic components like birth, death and migration, as a result of their respective processes like rate of fertility, mortality and migration.</h2>
There can be lots but some main ones are pesticides and disinfectantas hope this helps :)
Kinda like medicine. Vaccines go into the body and target the virus, some vaccines make the virus weak, some exterminate the virus completely, and some aren’t tested enough to work. However with all the little battles happening to kill the virus you can get sick from vaccines.
