The US Center for Disease Control and Prevention (CDC) warned urgently about the delta variant of the coronavirus, which is at the heart of the fourth wave in some countries, in an internal document presented to the press on Friday. With this variant, which appeared for the first time in India, the CDC showed that “the war has changed its face”. In the case of the Delta variant, the CDC has said that people who have been vaccinated can easily spread the virus.
The paper explains the science behind the U.S. government’s change in mask guidelines earlier this week. He comes to the conclusion that the delta variant is “very contagious, probably more serious” and that “breakthrough infections can be just as transmissible as unvaccinated cases”. Infections with the delta variant lead, according to the document, to higher virus levels in the body even in breakthrough cases in fully vaccinated people. In addition, these higher levels also last longer than previous strains, meaning that an infected person is likely to be contagious longer.
A pandemic of the unvaccinated
CDC director Dr. Rochelle Walensky said, however, that outbreaks mostly occur in unvaccinated people. “I think we are still largely in an unvaccinated pandemic,” Walensky said at a press conference on Tuesday. “The vast majority of transmissions, the vast majority of serious illnesses, hospital admissions and deaths occur almost exclusively in unvaccinated people. “
Vaccines continue to work
Vaccines continue to be effective, especially in preventing serious diseases, the document says. However, they may not be as effective at preventing infection or transmission of the Delta variant. This is a change compared to the previous variants. The document states that vaccinated people are three times less likely to get infected and vaccinated people are at least ten times less likely to develop serious illness or death.
The document also describes how the Delta variant is more contagious than previous versions of the coronavirus. A table attached to the document states that it is “more transmissible than Ebola, cold and flu viruses” and even smallpox, and that it is comparable to chickenpox, which is considered to be one of the most contagious viruses.