The historical progress of the HIV infection began to be tracked in 1979. Arrange the historical events in sequence of their discovery. (Separate letters by a comma and space as follows: A, B, C, D)
a. Infection in heterosexual men and women
b. Infection in hemophiliacs
c. Infection in injection drug users
d. Increased incidence of Kaposi carcinoma in young homosexual men
e. Increased incidence of Pneumocystis jiroveci (previously PCP)
ANS:
E, D, C, B, A
The history of the incidence of HIV infection was slow in being recognized. The first observation was an increase in incidence of Pneumocystis jiroveci, followed by increasing incidence of Kaposi carcinoma in the homosexual population. The infection began to be seen in injection drug users, hemophiliacs, then into the heterosexual population.
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