Select the correct order of events

A. Incubation period - invasion - colonization - infection

B. Invasion - incubation period - colonization - infection

C. Colonization - infection - incubation period - invasion

D. Infection - incubation period - invasion - colonization

Answer: Option D

Solution(By Examveda Team)

The correct order of events is Infection - incubation period - invasion - colonization.
Pathogenic mechanisms of the viral disease include (1) implantation of virus at the portal of entry is an infection of the pathogen, (2) local replication is the incubation period of the pathogen, (3) spread to target organs (disease sites) is an invasion of the pathogen, and (4) spread to sites of shedding of virus into the environment is colonization.