[BostonCard]

My hypothesis is that it is that colder weather is pushing people indoors, where the virus is spreading more efficiently.  If you look at the regional pattern of infections, the first wave hit in the New York area, where there was the greatest travel to and from Europe, where the pandemic was raging.  The second wave hit sun belt states (Florida, Texas, Arizona, and California) in the summer, where warm temperatures pushed people indoors.  The third wave is concentrated in the Midwest and Mountain West (Wyoming, Alaska, Montana), which are areas that were spared previously and where dropping temperatures have pushed people indoors.

BC

[BostonCard]

My hypothesis is that it is that colder weather is pushing people indoors, where the virus is spreading more efficiently.  If you look at the regional pattern of infections, the first wave hit in the New York area, where there was the greatest travel to and from Europe, where the pandemic was raging.  The second wave hit sun belt states (Florida, Texas, Arizona, and California) in the summer, where warm temperatures pushed people indoors.  The third wave is concentrated in the Midwest and Mountain West (Wyoming, Alaska, Montana), which are areas that were spared previously and where dropping temperatures have pushed people indoors.

BC