A team of scientists, including some from Denmark’s Department of Infectious Disease Epidemiology and Prevention, noted that most people with Covid-19 seem to be protected from re-infection for about six months. But a census of who is being re-infected has shown that they are mostly people aged 65 and over.
They looked at the reinfection rate among 4 million people during the second outbreak of Covid-19 from September 31 to December 31 and compare this with the infection rate during the first surge between March and May. Of the 11,068 people who tested positive during the first surge, only 72 tested positive again during the second.
The older age group had only 47% protection against recurrent infections compared to young people with about 0% protection from recurrence. The discovery is not entirely unexpected, as people’s age weakens their immune system.
“Dr. Stein Ethelberg, author of the study of Stan Ethelberg of Statins Serum,” said Dr. Stein Ethelberg, author of the study of Stan Ethelberg of Stan Stern Serum, in a statement issued by the Institute in Denmark.
“It’s very different,” said Dr. Amy Edwards, an infectious disease specialist at the University of Cleveland Hospitals Spitals, who was not involved in the study.
“I think to really protect them against future infections, we really emphasize how important it is to make sure everyone over the age of 60 is vaccinated.”
In a comment accompanying the study, immunologist Dr. Rosemary Boyton and Daniel Altman of Imperial College London described the difference in the refraction rate as “relatively worrying”.
“In general, 80% protection from refraction, which has been reduced to 47% in people aged 65 and over, is higher than the figures given by previous studies,” he wrote. Confirmation is that, if it were necessary, the hope of protective immunity from the SARS-Covy-2 natural infection could not be within our reach, and a global vaccination program with high-effectiveness vaccines is a permanent solution. “
The researchers analyzed test data from 10.6 million coronavirus tests taken by about 4 million people in Denmark, or about 69% of the country’s population.
They looked at the reinfection rate during the second outbreak of Covid-19 from September to December 31 and compared it with the rate of infection during the first outbreak between March and May. Of the 11,068 people who tested positive during the first surge, only 72 tested positive again during the second. Less than 1% of those infected are infected.
But in the second wave, 3.6% of people aged 65 and over became infected again.
Because of what is known as the immune system – this is not unexpected, it is the gradual deterioration of the immune system that comes with age.
“One of the reasons that people over the age of 0 have to take extra vaccines to boost their immunity to various infections is because we know that the immune system is starting to fade in later life,” Edwards said.
A great thing about the mRNA vaccine, like Pfizer and Modernani, Edwards said, is that the vaccine seems to alleviate some of the immune concerns because it offers such strong protection.
“We don’t know yet if people still need to get a booster, but it will be interesting to see and see how it works,” Edwards said. Edwards said.
One limitation of the study is that it looked at infection before many types of circulation, so it is unclear what effect it might have on the reinfection rate. Scientists have to see that something go ahead.
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