Question

The incubation period of measles is?

• A. 18 to 72 hours
• B. 10 to 14 days
• C. 3 to 4 days
• D. 20 to 25 days

Hint:

Think roughly 10 days to fever and 14 days to the rash.

Answer 1

The Correct Option is B

Step 1: Measles is an acute viral infection caused by an RNA paramyxovirus, spread mainly by respiratory droplets.

Step 2: The incubation period of measles is about 10 to 14 days, counted from exposure to the onset of fever and the prodrome. This is roughly 10 days to fever and about 14 days to the appearance of the rash. So option b is correct.

Step 3: The very short 18 to 72 hour range fits illnesses like influenza or cholera, while 3 to 4 days is too brief and 20 to 25 days is too long for measles. These do not match measles.

Step 4: Hence the incubation period of measles is 10 to 14 days.