removed stagnate water
Quarentine
Wearing a mask when working around bat or bird droppings
Profalactic
Washing it is a good preventive measure.
It's when there is something you're trying to stop (prevent) from happening, so you take a preventive measure (do something) to stop the thing you think might happen.
snakes/misquitos
Exercise.
no
Yes through misquitos!
They bite and suck your blood
synthetic immunoglobulins
Yes, arrest is used as a preventive measure. Criminals, thieves and robbers are usually arrested so that they do not cause problems to the public.