Being physically cold does not directly cause a cold - the illness is caused by viruses, primarily rhinoviruses. However, there is some scientific basis for why this misconception persists.
Cold weather can indirectly increase the risk of catching a cold virus in several ways: people spend more time indoors in close contact, cold air may slightly reduce immune system efficiency in nasal passages, and viruses may survive better in cold, dry air. Additionally, research suggests that cooling of the nasal passage may reduce local immune responses.
While wearing a coat won't prevent a cold virus infection, staying warm can help your body maintain optimal immune function. The best prevention methods remain washing hands frequently, avoiding close contact with infected individuals, and maintaining good overall health.
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