Doctor specialized in Infectology . Medical Professional, specialized in Infectology. They prepare to study, prevent, diagnose and treat all kinds of infectious diseases. They analyze the behavior of viruses, bacteria and all kinds of infectious agents (others may be fungi, prions or parasites) and how to counteract their effect. Many specialize in creating methods to eradicate and eliminate infectious agents, usually with vaccines. Virologist is the one who specializes in Virus, Epidemiologist who specializes in the behavior of epidemics and their treatment, Fungologist is a specialist in Mushrooms. Bacteriologist in Bacteria.