Viral Diseases

A virus is a microscopic organism and can be found in soil, water and even in other living organisms like humans, plants, animals, etc. Though a human body hosts viruses, not all become a cause of disease. 

The immune system is responsible for protecting human beings against diseases caused by viruses by producing antigen. Notably, these antibodies do not just identify infection but also destroy them effectively.

Keeping that in mind, let us proceed to find out more about viral diseases!

What are Viral Diseases?

In simple words, these are infections or diseases caused by viruses. Now, the type of viral disease depends entirely on the virus that is causing it.

Often an infection caused by a virus can be fatal, while at other times the impact may not even be noticeable. Also, the same virus can affect different organisms in different ways. 

These are Some of the Most Common Examples of Viral Diseases –

  1. Common cold

  2. Influenza

  3. Measles

  4. Herpes

  5. Rabies

  6. Ebola 

  7. Severe Acute Respiratory Syndrome

  8. Chicken pox

  9. Mumps

  10. Viral Hepatitis

  11. AIDS

  12. Polio

Viruses like human papillomavirus (HPV) can even become a cause of cancer in their host. 

Test Your Knowledge: 

Which of These is a Contagious Venereal Disease?

  1. Cancer 

  2. b) Phenylketonuria 

  3. c) Rabies 

  4. d) Typhoid.

Along with this above information, let us now find out more about the list of diseases caused by a virus and their symptoms.

This Table Below Highlights Diseases Caused By Viruses in Human Beings.

Types of Viral Diseases


Virus Disease



Common cold




Rabies virus


Infectious hepatitis 

Hepatitis virus



Influenza virus



Measles virus






Variola virus







Table: List of Viral Diseases in Humans

Causes of Viral Diseases

It is noteworthy that viruses cannot replicate on their own and are entirely dependent on a host. As a result, they are classified as parasites. 

They transmit when an infected person comes in close contact with a healthy person. Notably, the composition of a virus influences its ability to spread.

Some of the conventional means of transmission include – touch, contact with body fluids, ingesting contaminated water and diet, sexual contact, etc.

Symptoms of Viral Diseases

These are among the most common symptoms of viral diseases –

  1. Fever and fatigue

  2. Sore throat 

  3. Headache

  4. Rashes

  5. Swollen tonsils

  6. Running nose

  7. Body ache

  8. Diarrhoea and/or vomiting 

It is noteworthy that symptoms for a particular viral disease may differ from those one another.

Treatment of Viral Diseases

There is no cure against most viruses. However, vaccination proves immensely useful when it comes to containing them. 

Besides vaccination, following are the advice that go a long way in fighting against diseases caused by viruses.

  1. Nutritious diet

  2. Drinking adequate fluids

  3. Proper rest 

  4. Prescribed medication for fatigue, fever and body aches.

It must be noted that the treatment of a viral disease may vary widely, so it is best to avail medical treatment and avoid self-diagnosis.


An organism can resist or combat the venereal infection and prevent it from turning into a full-fledged disease.  In a broader sense, immunity is classified into two types – innate immunity and acquired immunity.

Innate immunity is present in organisms since birth and is usually inherited from their parents. Innate immunity is manifested as barriers, which include – physical, cellular, and physiological and cytokine.

On the other hand, acquired immunity develops over time throughout an organism’s lifetime. It is further manifested as active immunity or passive immunity.

The human immune system comprises lymphoid organs, antibodies, lymphoid tissues and immune cells. Human beings with strong immunity are less likely to succumb to diseases caused by viruses. 

Find out more about such list of diseases caused by a virus and their symptoms by joining our free live online classes today. Also, access our free PDF study materials to strengthen your knowledge about other related topics. Now you can also download our Vedantu app for easier access to related study material and online sessions.

FAQ (Frequently Asked Questions)

1. What are Some Diseases Caused By a Virus?

Ans. These are some of the most prevalent viral diseases - Common cold, Measles, Rabies, influenza, Herpes, Severe Acute Respiratory Syndrome, AIDS, Viral Hepatitis, etc.

2. What are Viral Diseases?

Ans. It is an infection or disease that develops inside a host's body on being infected with viruses. While some viral diseases may not manifest any significant symptoms, they might prove to be fatal over time. 

What are the Common Symptoms of Most Viral Diseases?

Ans. Some of the common symptoms include – fatigue, fever, headache, vomiting, running nose, body ache, sore throat, swollen tonsils, etc. Since these symptoms are common in most viral infections, one must seek medical attention for an accurate diagnosis.