National Geographic@NatGeo·Aug 21, 2021The takeaway? Masks and vaccination are needed to prevent viral transmissionnationalgeographic.comEvidence mounts that people with breakthrough infections can spread Delta easilyA new study finds that this dominant variant can grow in the noses of vaccinated people as strongly as in unvaccinated people.26105402
雲水@foodofthegods3Replying to @NatGeoWhat was the popular definition of insanity again? "Doing the same thing over and over again, expecting to get a different result?"10:21 PM · Aug 21, 2021·Twitter Web App4 Likes
