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
A) immune response.
B) incubation period.
C) inoculation period.
D) antibody activity.
Question 2
All of the following are key risk factors for TB EXCEPT
A) poverty.
B) HIV infection.
C) lack of access to treatment.
D) improved sanitation.