How does the common cold spread in human body?

The common cold is a contagious respiratory illness caused by a virus. It spreads through contact with an infected person or by inhaling respiratory droplets that contain the virus. The virus can enter the body through the mouth, nose, or eyes.

Once inside the body, the virus multiplies and causes inflammation of the nose and throat. This can lead to a variety of symptoms, including:

* Runny nose

* Congestion

* Sore throat

* Sneezing

* Coughing

* Fever

* Fatigue

* Headache

* Muscle aches

The common cold is usually mild and goes away on its own in a few days. However, it can sometimes lead to more serious complications, such as pneumonia, bronchitis, and ear infections.

Here are some tips to help prevent the spread of the common cold:

* Wash your hands frequently with soap and water.

* Avoid touching your face with unwashed hands.

* Cover your mouth and nose when you sneeze or cough.

* Stay home when you are sick.

* Get plenty of rest.

* Drink plenty of fluids.

* Take over-the-counter medications to relieve your symptoms.

If you have any questions or concerns about the common cold, talk to your doctor.