Which of the following is not a viral disease?

The correct option is C

Typhoid

The correct option is C.

Explanation of correct option:

1. The infections, which are caused by the microbes like viruses are known as viral diseases.
2. Viral infections are spread from one person to another via contamination, that is, by sneezing, breathing, coughing, etc.
3. Typhoid is a bacterial disease, not a viral disease.
4. Typhoid is caused by Salmonella typhi and is spread from contaminated water and food.
5. Some of the symptoms of typhoid are headache, pain in the stomach, diarrhea, fever, etc.

Explanation of incorrect options:

Option A:

1. Dengue also known as break-bone fever is caused by the virus known as dengue virus.
2. It is spread by a female Aedes mosquito, that is, it acts as a carrier.
3. The symptoms of dengue are headache, fever, joint pain, vomiting, etc.

Option B:

1. AIDS or Acquired Immunodeficiency Syndrome is caused by a virus known as HIV (human immunodeficiency virus).
2. It hampers the immune system of the body and is spread via contaminated body fluids like semen, vaginal discharge, blood, etc.
3. The processes and organs of the body, which offer protection against toxins and infections are collectively known as the immune system.

Option D:

1. Influenza or flu is caused by the influenza virus.
2. It is the most commonly found viral infection.
3. The symptoms of the disease are coughing, fever, joint pain, headache, etc.

Final answer: Typhoid is not a viral disease.