Viral triad include

A. Rinder pest virus, measles virus and canine distemper virus

B. Rinder pest virus, mumps virus, measles virus

C. Measles, mumps and rubella viruses

D. Rinder pest virus, reo virus and rhabdo virus

Answer: Option A

Solution(By Examveda Team)

Viral triad includes Rinder pest virus, measles virus, and canine distemper virus.
The triad consists of an external agent, a susceptible host, and an environment that brings the host and agent together.
In this model, disease results from the interaction between the agent and the susceptible host in an environment that supports the transmission of the agent from a source to that host.