How does a virus get into human body?

There are several ways a virus can get into the human body:

1. Through the respiratory system: This is the most common route of infection for viruses like the flu, common cold, and COVID-19. When an infected person coughs, sneezes, or talks, they release tiny droplets containing the virus into the air. These droplets can be inhaled by others who are in close contact, leading to infection.

2. Through contact with contaminated surfaces or objects: Some viruses, such as norovirus and hepatitis A, can survive on surfaces for extended periods of time. If someone touches a contaminated surface and then touches their face, particularly their mouth, nose, or eyes, they can become infected.

3. Through contact with infected people or animals: Some viruses can be transmitted through direct contact with an infected person or animal. This is common for viruses such as HIV, hepatitis B, and rabies. Transmission can occur through bodily fluids like blood, semen, or saliva.

4. Through bites or stings from infected animals or insects: Viruses such as rabies, yellow fever, and malaria can be transmitted through the bites of infected mosquitoes, ticks, or other insects.

5. Through contaminated food or water: Viruses like norovirus and hepatitis A can be transmitted through the consumption of contaminated food or water. This can occur if food or water is not properly cooked, handled, or stored.

It's important to practice good hygiene and follow preventive measures to reduce the risk of infection by viruses. These include:

- Washing your hands frequently with soap and water, especially after coughing, sneezing, or using the bathroom.

- Avoiding touching your face, particularly your eyes, nose, and mouth, with unwashed hands.

- Covering your mouth and nose with a tissue when coughing or sneezing, and disposing of the tissue immediately.

- Avoiding close contact with people who are sick.

- Getting vaccinated against preventable viral infections.

- Following safe food and water handling practices.

By following these precautions, you can significantly reduce your risk of contracting a viral infection.