Out of the following, which disease is caused by virus ?

Options

A. Malaria
B. Influenza
C. Diphtheria
D. Typhoid

Answer

To determine which disease from the provided options is caused by a virus, we will analyze each option step by step.

**Step 1: Analyze the first option - Malaria**
- Malaria is a disease caused by a protozoan parasite known as Plasmodium. It is transmitted through the bite of infected Anopheles mosquitoes.
- **Conclusion**: Malaria is not caused by a virus.

**Step 2: Analyze the second option - Influenza**
- Influenza, commonly known as the flu, is caused by the influenza virus. It is a contagious respiratory illness that can cause mild to severe illness.
- **Conclusion**: Influenza is caused by a virus.

**Step 3: Analyze the third option - Diphtheria**
- Diphtheria is caused by a bacterium called Corynebacterium diphtheriae. It primarily affects the throat and can lead to severe complications if not treated.
- **Conclusion**: Diphtheria is not caused by a virus.

**Step 4: Analyze the fourth option - Typhoid**
- Typhoid fever is caused by the bacterium Salmonella typhi. It is transmitted through contaminated food and water.
- **Conclusion**: Typhoid is not caused by a virus.

**Final Conclusion**: After analyzing all the options, the only disease caused by a virus is **Influenza**.