Tests related to chickenpox include the following: i. Routine blood tests, which may show normal or increased total white blood cells and a possible elevated percentage of lymphocytes. Herpes scraping examination, which shows multinucleated giant cells and intranuclear inclusion bodies. Antigen tests and nucleic acid tests are used to further confirm the diagnosis of herpes virus infection. Chickenpox is an acute respiratory infection caused by varicella-herpes virus, which is self-healing and highly contagious, but is not contagious after crusting. The rash has a centripetal distribution and may be accompanied by macules, papules, blisters and crusts. Chickenpox rarely recurs, and the virus can remain latent in the body for a long time and can lead to herpes zoster. The susceptible population is mainly adolescents and children, as well as middle-aged and elderly people who are immunocompromised.