Fresno, California 2021-12-03 13:30:30 –
One research group is tracking reinfection in South Africa and reports a surge due to the arrival of Omicron, which was not seen when two previous mutants, including the highly contagious delta mutant, traveled through South Africa. bottom.
The findings posted online on Thursday are preliminary and have not yet been scientifically reviewed. The researchers also do not say which part of the reinfection was identified as a case of Omicron, or whether they caused a serious illness.
However, the timing of the surge in reinfection suggests that Omicron “provides substantial population-level evidence of avoidance of immunity from previous infections,” they wrote.
At a World Health Organization briefing Thursday, one of the researchers at the University of the Witwatersrand, Ann von Gottberg, said, “Previous infections were used to protect against deltas, but now it doesn’t seem to be the case at Omicro. “.
This study also does not consider the protection provided by vaccination. Coronavirus vaccines cause different layers of the immune response. Some are to prevent infection, while others are to prevent serious illness if someone gets infected.
“But I still believe the vaccine will prevent serious illness,” said von Gottberg.
Dr. Michael Ryan, who is responsible for the WHO emergency, said that reinfection appears in the nose but does not necessarily lead to serious illness, and vaccines generally help protect the rest of the body. Was shown.
“The data we really see will be about the severity of the infection and whether the vaccine will continue to protect against severe illness, hospitalization and death,” Ryan said. “And so far, there’s no reason they think they won’t. We don’t know the details yet.”
The latest variants were discovered about a week ago by South African and Botswana scientists and are now found in several countries. As some health officials suspect, there are many new variants, such as whether it is more contagious, whether it makes people more seriously ill, and whether it can block the vaccine. Remains unknown.
However, it is important to know how much protection a pre-infection provides, especially in parts of the world where many of the population is not vaccinated.
“Omicrons will be able to overcome natural and perhaps vaccine-induced immunity to a large extent,” said Paul Hunter, a professor of medicine at the University of East Anglia, in writing to the findings. I mentioned in the answer in. “It is doubtful whether this represents a complete escape, but it is still unclear.”
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