Question

what are the four things which need to be present to spread a communicable disease?name and describe in one line.​

Answer 1

Answer:

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⇒Infectious agents include helminths, protozoa, bacteria, viruses and fungi. Six factors are involved in the transmission of communicable diseases: the infectious agent, the reservoir, route of exit, mode of transmission, route of entry, and the susceptible host.

Answer 2

Answer:

Infectious agents include helminths, protozoa, bacteria, viruses and fungi. Six factors are involved in the transmission of communicable diseases: the infectious agent, the reservoir, route of exit, mode of transmission, route of entry, and the susceptible host.