RT [@linseymarr](https://twitter.com/linseymarr/status/1344793106189852673) Transmission of the new variant B.1.1.7: Either (1) people infected with it shed more virus, (2) the virus survives better in air and on surfaces, or (3) you can be exposed to less virus and still become infected. Time to double-down on all precautions. https://t.co/rrTIkMciAz