Which is the most infectious disease : -

Which is the most infectious disease : -
A Hepatitis-B
B AIDS
C Cough and cold
D Malaria

Detailed Solution

Hepatitis B virus is extremely infectious: it is about 50–100 times more infectious than HIV. It spreads through blood, body fluids, sexual contact and from mother to child, and survives outside the body for days.
Even a tiny amount of infected blood (e.g. on a shared razor or needle) can transmit it.
So, as per the answer key, hepatitis B is the most infectious disease among these. (It can be prevented by vaccination.)

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