Study suggests delirium can predict Covid in the elderly

Henrietta Brewer
November 21, 2020

Scientists had feared that those who developed only mild infections would be unlikely to have a strong immune response, but nearly all developed cells capable of creating new antibodies if they encountered the virus again.

"The majority of subjects had a mild case of COVID-19, not requiring hospitalization; 92% of subjects were never hospitalized for COVID-19; 7% of subjects were hospitalized, some of whom required intensive care unit (ICU) care", the authors of the study said.

It is still not entirely clear how long contracting the virus confers immunity, with early studies suggesting a period of a few months, which, therefore, means that it may only provide temporary protection against reinfection.

Antibodies were undetectable after 50 days in individuals who "develop modest neutralizing antibody titres after infection", while those patients who had more severe symptoms could continue to produce antibodies up to 60 days after infection, that study found.


This study mirrors the recent results of research from Iceland.

Globally, scientists have been studying the immunity response among people infected with covid-19.

Coronavirus antibodies last at least six months and offer protection against a second infection, a study of healthcare workers suggests.

Coronavirus is absolutely a new infection in people and people don't have immunity to the virus when the pandemic started. "But this latest study shows that there is some immunity in those who have been infected".


Pairs of antibodies may be more effective than single antibodies at preventing and treating COVID-19, according to a new study by researchers at the University of North Carolina at Chapel Hill and The Rockefeller University in NY.

They found that eight months after infection, most people who recovered still had enough immune cells to fight off the virus and prevent illness. The new data also claims that these cells may remain in the body for a very long time, which also strikes off the possibilities of reinfection and the need for repeated vaccinations in the near future. The researchers however said that more research is needed to determine whether similar findings would emerge among a larger group of people across more time points.

Staff with antibodies were also less likely to test positive for COVID-19 without symptoms, the researchers said, with 76 without antibodies testing positive, compared to only three with antibodies.

Several cases of reinfection have been reported, in which people with confirmed COVID-19 recover and then test positive - with a different strain of the virus - a few months later. Covid-19: Two of the vaccine front runners have already reported promising evidence - so what now? The drugs could be repurposed for use in COVID-19.


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