Weather played peculiar role in spread of COVID-19 over past year
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Pedestrian traffic is scarce along 7th Avenue in during heavy snow in Times Square in New York City on December 16, 2020. Snowstorms this winter held up vaccine shipments and the rare winter freeze in Texas for a week also disrupted mitigation efforts. File Photo by John Angelillo/UPI | License Photo
March 12 -- As the world marks one year since the World Health Organization designated the coronavirus outbreak a global threat, a look back at the past 12 months shows how much has been learned about how the virus is structured, how it spreads and how it behaves.