Why can you catch a cold when it's cold, but it's good when it's hot?

When the weather is cold, the immune function decreases, and the cold temperature conditions in the nasal cavity are more conducive to the replication of the virus that causes the common cold. They are all caused by the body feeling cold and catching cold, and many of them still belong to the symptoms caused by body deficiency and lung cold. Reasonable maintenance and rest are still very important. When the weather is hot, the cold virus will be killed by the immune system.