What causes the common cold?

    Researchedby:
    Nick Milazzo

    Fact-checked

    by:

    Mike Murray, James Gaylor
    Last Updated: October 25, 2023

    The common cold is caused by a large number of viruses. Over 200 viruses have been identified as causing colds, many of which are classified as rhinoviruses. These viruses are constantly present in the environment, and infection can occur from physical contact with infected people or surfaces, breathing in small-particle aerosols containing virus in the air, or being directly hit by large-particle aerosols from a person coughing or sneezing.[1][2] Infections are most common in the winter and spring and during rainy seasons in tropical areas.[1]

    References

    1. ^Heikkinen T, Järvinen AThe common cold.Lancet.(2003-Jan-04)
    2. ^Centers for Disease Control and PreventionCommon Cold