Ques. 1AIPMT 2001
Which is the most infectious disease?
- AIDS
- Malaria
- Hepatitis-B
- Cough and cold
Answer
(4) Cough and cold
Solution
As per NCERT, the common cold is caused by rhinoviruses which infect the nose and respiratory passage.
∵ Droplets from the cough or sneeze of an infected person are either inhaled directly or transmitted through contaminated objects such as pens, books, cups, door knobs and computer keyboards.
⇒ It spreads very easily by casual contact, whereas AIDS and hepatitis-B spread only through body fluids (blood, sexual contact) and malaria only through the bite of an infected female Anopheles mosquito.
∴ Cough and cold is the most infectious disease.
Answer: (4)