National Geographic: Ausbruch des Mount St. Helens - Ganze Folge | Sekunden vor dem Unglück

national geographic: Evidence mounts that people with breakthrough infections can spread Delta easily

A preliminary study has shown that in the case of a breakthrough infection, the Delta variant is able to grow in the noses of vaccinated people to the same degree as if they were not vaccinated at all. The virus that grows is just as infectious as that in unvaccinated people, meaning vaccinated people can transmit the virus and infect others. more...