Both IgM and IgA are considered earlier indicators for some viral exposure, and they help in diagnosing COVID-19. Commonly, they take around 3-7 days to form after initial exposure. Contrarily, IgG commonly takes around 10-14 days to form after initial exposure. It might indicate earlier infection, too, which might be solved or is continuing to be solved. Both IgG IgM tests are different from one another. IgG will propose insights into a person’s previous exposure to Coronavirus and the probability of protective immunity. This finally helps in recognizing people who might be capable of resuming work beside other regular activities.