Which of the following diseases is caused by a virus?

Correct option is B

The correct answer is: (b) Measles
Explanation:
· Measles (also known as Rubeola) is a highly contagious infectious disease caused by a virus (specifically the measles morbillivirus of the paramyxovirus family).
· It primarily affects the respiratory system and is transmitted through airborne droplets from the nose, mouth, or throat of an infected person (coughing or sneezing).
· The virus replicates in the nose and throat of an infected child or adult.
· Symptoms typically include a high fever, cough, runny nose, and red, watery eyes, followed by a characteristic red rash that spreads all over the body.
Information Booster:
· Prevention: The most effective way to prevent measles is through the MMR vaccine (Measles, Mumps, and Rubella).
· Koplik's Spots: A distinctive diagnostic sign of measles is the appearance of small white spots with bluish-white centers on a red background inside the mouth (on the inner lining of the cheek) before the skin rash appears.
· Global Target: Measles elimination is a major goal of the World Health Organization (WHO), as it remains a leading cause of death among young children globally, despite the availability of a safe and effective vaccine.
Additional Knowledge (Incorrect Options):
Malaria (Option a)
· Malaria is caused by a Protozoan parasite (genus Plasmodium), not a virus. It is transmitted to humans through the bite of infected female Anopheles mosquitoes.
Tuberculosis (Option c)
· Tuberculosis (TB) is a bacterial infection caused by the bacterium Mycobacterium tuberculosis . It mainly affects the lungs.
Cholera (Option d)
· Cholera is an acute diarrheal illness caused by infection of the intestine with the bacterium Vibrio cholerae . It is usually spread through contaminated water or food.