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Gravitas: Why do more people catch a cold in winter?
Viruses and bacteria plague the air throughout the year. Then why are respiratory illnesses more common in winter? A new study answers the question. Molly Gambhir tells you more.
Viruses and bacteria plague the air throughout the year. Then why are respiratory illnesses more common in winter? A new study answers the question. Molly Gambhir tells you more.
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