The Delta variant was first detected in India in December of 2020 and likely arrived in the United States around March. Luckily for us, the Delta variant is far less likely to cause serious disease or death in people who are fully vaccinated against COVID-19. Science CDC document paints more dire picture of threat posed by Delta variant The Delta variant is more formidable than previously believed, due to its ability to infect and be spread by people who are vaccinated, a CDC document says. AdvertisementThe Delta variant reduced that timeline to just four days, allowing it to spread through communities with unprecedented speed. AdvertisementResearchers have found evidence that one of the Delta variant’s mutations — called P681R — makes this essential cleaving step easier and more efficient than it is in previous variants.

Source: Los Angeles Times July 30, 2021 18:22 UTC