Chickenpox and Cold Weather: Is There a Connection?

Chickenpox (varicella) is not caused by cold weather and can occur year-round. However, transmission may increase in colder months because:

  • People spend more time indoors in close proximity.
  • Indoor gatherings (schools, holidays) facilitate spread via respiratory droplets and direct contact.
  • Lower humidity may prolong virus survival in the air.

The varicella-zoster virus is highly contagious. Vaccination remains the most effective prevention, regardless of season.

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