They are gold miners in French Guiana, revelers in Cape Cod and health care workers in India. Although they live in different worlds, they ultimately have two things in common. Everyone is vaccinated against COVID-19. They all become part of the infected group.
In recent weeks, such cases have proved that even in A group where almost everyone is vaccinated, Which caused alarms among health officials and undermined America’s hopes of a quick return to normal operations.
In May 2021, the CDC told vaccinated Americans that they could not wear masks, but on Tuesday the agency changed direction, saying The vaccinated person should wear a mask in indoor public places.
The reason is that investigators learned from the outbreak in Provincetown, Massachusetts, that a seaside town on Cape Cod hosted a noisy parade and weeks of crowded pool parties in early July. Health investigators say that since then, there have been more than 800 cases of covid-19 related to these events, 74% of which were vaccinated people.
The Provincetown outbreak was caused by the so-called delta mutation, which is now the majority of cases in the United States.exist Statement issued todayThe head of the CDC, Rochelle Walensky, said that the “key finding” is that Provincetown seems to have as many people who have been vaccinated with the delta virus as those who have not been vaccinated.
“The high viral load indicates an increased risk of transmission and raises concerns that, unlike other variants, people who have been vaccinated with delta can transmit the virus,” she said.
The recommendation suggests a quick return to stratified countermeasures, including wearing masks and maintaining social distancing, which may also complicate the reopening of schools in the United States starting next month.
Gold mine infection
For several weeks, investigations around the world have been establishing evidence of an outbreak among vaccinators.For example, a scientific team in Paris and French Guiana Recently described Although almost all miners were vaccinated by Pfizer, how covid-19 swept South American gold mines in May.
Despite being vaccinated, 60% of people are still infected with a variant called gamma. This surprised the scientists so much that they checked whether the vaccine was damaged during transportation, but they did not.