- from Blood
Viruses need living beings to multiply and survive.
They need you! Viruses survive by spreading from body to body all over the world. Bacteria, on the other hand, can multiply on their own.
A few viruses travel through the air. The cold virus does that. Most killer viruses don’t. These deadly germs spread by direct contact, like when an infected mosquito bites a human. The germs enter the victim’s bloodstream and cause serious problems. Hemorrhagic (hem-uh-RAJ-ik) fever viruses are one group of viruses. The victims get feverish, and then they bleed to death internally.
On the map below, you can see where some hemorrhagic fever viruses started. You can also see the animals that helped them spread. Some sites have few outbreaks. But these viruses make people sick all over the world, every year.