Monitoring of a new mutant of the Corona virus in South Africa


A new study found that those who were infected with the Corona virus for the second time, were 90% less likely to reach the hospital or die compared to the first infection.

The study, conducted in Qatar, was published in the journal “New England Journal of Medicine“Cases of re-infection were very rare, and if they were present, they were mild and without seriousness.

The study followed 353,326 people who were infected with corona, and the results were generally encouraging.

The first wave of infections hit Qatar between March and June of 2020.

The study found that about 40 percent of the research community had antibodies to COVID-19.

The study examined the same people, to determine how many were infected again.

Scientists from Weill Cornell Medical College in Qatar (who conducted the study) compared records of people with confirmed infections between February 2020 and April 2021. After they excluded 87,547 people who had received the vaccine. They found that of the remaining cases, there were only 1,304 infections.

The median time between first illness and reinfection was about nine months. Of those who developed a second infection, only four were severe enough to require hospitalization.

According to the same study, there were no cases requiring treatment in the intensive care unit. There were no deaths among the group infected with the second infection, while there were seven deaths in the primary infections.

While the study was conducted in Qatar only, it is not clear whether the virus will behave in the same way anywhere else in the world, according to the study report.

Previous studies showed that natural immunity reduces the risk of infection, again. and found One of the studies conducted in Denmark, and published last March, found that most people who contracted corona were protected from infection again and remained stable for more than six months.

And checking the demographics of those who were infected again showed that most of them were elderly. This study does not explain how long the protection will last, and neither does the new Qatar study.

Research on natural immunity shows that antibody levels also vary widely from person to person.

Scientists still don’t know what level of antibodies is needed to avoid the risk of infection, but in some cases, levels after infection may not be enough to prevent someone getting sick again.


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