Question

A mother, father, and son live together in the same house. The mother passes a cold to her son. The son then passes the cold to his father. If the virus has not mutated, should the mother be worried about catching the cold again from her husband?

a)
No, memory cells will help the mother's immune system to quickly eliminate the virus.

b)
Yes, although the mother has produced some antibodies to the cold virus, it can still overwhelm her immune system.

c)
No, the T cells that are left from the previous infection can kill off any virus.

d)
Yes, the immune system will treat the cold virus like a new infectious agent.

f)
No, because the virus has not mutated, her physical barriers will protect her from the virus.

Answer 1

Option c (No, T cells left from the previous infection can kill any virus.

)

Step-by-step explanation:

When ever viral infection occur, body's immune system start to fight against it by activating B-cells and T-cells.

B-cells produce antibodies that bind with virus and act as label. This label indicate virus as foreign substance. Hence T-cells recognize it and kill it. Furthermore, B-cells form memory cell that keep the viral memory. if this viral infection occur again in future, T-cell recognize it and eliminate the virus.This mechanism is called immunity.