Protozoa are single-celled parasites, and the way one gets in tells you how to stop it. Tap each parasite to see the disease it causes, how it spreads, and how it moves.
Pick a parasite
Moves by —
Four protozoan parasitestap one to begin
How protozoa spreadMost of these ride in on contaminated water or food (fecal–oral), but one needs a mosquito and one needs sexual contact. The route decides the prevention.