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While all Corona vaccines are surprisingly successful in preventing serious complications and death from Covid-19, the extent of their success in preventing the transmission of infection remains relatively mysterious.
Therefore, the Centers for Disease Control and Prevention in the United States yesterday, Thursday, withdrew from controversial comments by its director, Dr Rochelle B Wallinski, after considering that vaccinated people never become infected or transmit the disease. viruses to others.
This claim has raised several questions about the precautions that vaccinators take, such as wearing masks and only meeting in limited circumstances with people who have not received the vaccine.
An avalanche of criticism
Which prompted a spokesperson for the agency to clarify that “it is possible to infect some people who have been fully vaccinated, but he said the evidence is unclear as to whether they can transmit the disease. viruses to others. ” “We continue to assess the evidence,” he added, according to the New York Times.
It came after the agency received a torrent of criticism from scientists who pointed out that current research was not at all sufficient to claim that vaccinated people could not spread the virus.
In the background, Paul Duprex, director of the Vaccine Research Center at the University of Pittsburgh, said the data indicates “the difficulty of infecting people who have been vaccinated, but doesn’t think for a second that they won’t be. infected “, as he put it.
According to CDC data, one dose of Moderna or Pfizer was 80% effective in preventing infection, while both doses were 90% effective.
The history of “total protection”
Although these percentages indicate that transmission from those vaccinated may be unlikely, Wallinski’s comments consider protection to be complete.
“Vaccinated people don’t carry the virus and don’t get sick (..) and it’s not just in clinical trials, it’s also in real world data,” Walinsky said.
But the director of the Centers for Disease Control and Prevention in the United States reiterated the importance of continuing to wear masks and maintaining precautions, even for those vaccinated.
“Need to be corrected”
However, the brief comment has been widely interpreted as saying that vaccines offer complete protection against infection or transmission.
In turn, John Moore, a virologist at Weill Cornell Medical College, affiliated with Cornell University in New York, explained that “While Dr Wolinsky had said that most people vaccinated did not carry the virus, this controversy did not. would not have arisen. (..) What we know is that vaccines are very effective. Strongly against infection – and there is more and more data on this – but nothing 100% … This is an important public health message that needs to be corrected. “
Dr Peter Bach, director of the Center for Health Policy and Results at Memorial Sloan Kettering Cancer Center in New York, said the CDC director’s statements opened “the door for skeptics who believe the government is distorting the image of science. and completely undermines any remaining arguments about the need for people to continue wearing gags after vaccination. “
It is reported that clinical trials of vaccines are only designed to assess whether vaccines prevent serious illness and death. Dr Walinsky’s dramatic comment came just a day after appealing to the American public to continue to take precautions.
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