In case of HIV infection, the period between the infection and appearance of symptoms is usually -
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → 5-10 years
After HIV enters the body, there is a time lag before the symptoms of AIDS appear. This period is a few months to many years, and it is usually 5-10 years. During this time the virus multiplies inside macrophages and helper T-lymphocytes. The number of helper T-lymphocytes falls slowly, and the body becomes unable to fight infections.
NCERT Extract:
AIDS – “… Find out and make a list of such conditions. It is important to note that HIV/AIDS is not spread by mere touch or physical contact; it spreads only through body fluids. It is, hence, imperative, for the physical and psychological well-being, that the HIV/AIDS infected persons are not isolated from family and society. There is always a time-lag between the infection and appearance of AIDS symptoms. This period may vary from a few months to many years (usually 5-10 years).”