Two weeks ago your nephew came down with the chickenpox while visiting. now you have itchy, crusted spots on your arms and you feel terrible. you probably were infected with the chickenpox virus when your nephew was there but did not get sick until now because of the incubation period. inoculation period. antibody activity. immune response.

Incubation period

Explanation:

The incubation period is the time period between the entry of pathogen into the host body and the appearance of signs and symptoms. Chickenpox is caused by varicella-zoster virus that has an incubation period of 10-23 days after which the symptoms of the disease appear.

The virus must have spread from the infected nephew two weeks ago but did not cause any sickness until now due to the incubation period.

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what is a measurement of the earth’s history divided into time periods?

> fossil record <

sedimentary rock

> geologic time scale <

radioactive elements