Cold & Illness: What Really Causes a Cold?

The common cold is caused by viruses, not by cold weather or dampness.

It is true that cold temperatures can reduce blood circulation, and cold, damp weather can create a favorable environment for viruses to survive. However, the human body is well-adapted to extreme weather conditions, and most people can withstand cold weather without experiencing cold symptoms.

People who are already sick with a cold or other viral illness may experience worse symptoms in cold weather, but this is due to the virus, not the weather itself.

A number of factors can make people more susceptible to catching a cold, including:

- A weakened immune system: People who are under a lot of stress, don't get enough sleep, or have certain medical conditions such as HIV/AIDS or diabetes are more likely to get sick.

- Close contact with someone who is sick: People who live or work with someone who is sick are more likely to catch a cold.

- Touching your face with unwashed hands: The cold virus can enter your body through your eyes, nose, or mouth. Touching contaminated surfaces and then touching your face can increase the risk of catching a cold.

- Being in a crowded environment: Crowded environments make it more likely to come into contact with someone who is sick.

- Not getting enough vitamins: A lack of vitamin C and vitamin D can weaken the immune system and make you more susceptible to getting sick.

- Not getting enough sleep: When you don't get enough sleep, your body is not as able to fight off infection.