From News Max.com (Mar. 23):
Danish researchers have found the vast majority of people infected with COVID-19 have immunity against reinfection for 6 months, reducing the chances by about 80% for those under the age of 65, according to a new study.
Perhaps more problematic, though, considering the dangers for the more vulnerable elderly, is past infection for those older than 65 reduces the chances of reinfection by just 47%, the study published in the journal Lancet found, The New York Times reported.
It has long been reported by scientists, COVID-19 cases are most severe and deadly for older people and those with weakened immune systems.
Scientists told the Times the reinfections are more likely to be asymptomatic or mild because of the immune response triggered by the body.
"A lot of these will be asymptomatic infections, and a lot of these will likely be people who have a blip of virus," Icahn School of Medicine at Mount Sinai in New York's Florian Krammer told the Times. "Eighty percent risk reduction against asymptomatic infection is great."
Among 11,068 COVID-19 positives from the first wave between March-May 2020 in the study, just 72 again tested positive September-December (0.65%) – which is compared to 3.27% who tested positive for the first time – according to the research. [read more]
Another article on the topic:
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