#biology #disease


Infections happen when a contaminant infect a host. Infections are caused by bacteria, virus or parasites.

Infections can be acute (short lived), chronic (last for weeks and up to lifetime) and latent (might not cause symptoms and activate or reactivate after lengths of time).

Diseases are sometimes dormant in a host carrying it for an extended period of time and infecting other hosts. This is called a reservoir.