What are viral diseases?
Viral diseases are diseases caused by viruses. These diseases occur when viruses enter the body, infect living cells, and multiply rapidly.
Viruses are microscopic infectious agents that cannot reproduce without a host cell.
Caused by viruses
Often spread quickly from person to person
May affect different organs and body systems
Some viral diseases are mild, while others can be severe
| Viral Disease | Virus Responsible |
|---|---|
| Common cold | Rhinovirus |
| Influenza (flu) | Influenza virus |
| COVID-19 | Coronavirus |
| AIDS | HIV |
| Polio | Poliovirus |
| Dengue | Dengue virus |
Viral infections can spread through:
Air droplets from coughing or sneezing
Direct physical contact
Contaminated food or water
Insect bites
Blood and body fluids
Symptoms vary depending on the disease but may include:
Fever
Cough
Weakness
Headache
Body pain
Skin rashes
Viral diseases can be prevented by:
Vaccination
Hand washing and hygiene
Covering mouth while coughing or sneezing
Avoiding contact with infected individuals
Controlling mosquitoes and vectors
Some viral diseases recover naturally with rest and care
Antiviral medicines may help in certain infections
Antibiotics do not work against viruses
Vaccines are one of the most effective ways to prevent viral diseases and reduce their spread in communities.