COVID population immunity may not last

Modesto Morganelli
Ottobre 29, 2020

Autoantibodies may explain why some COVID-19 patients become "long-haulers", suffering from long-term symptoms after the initial infection.

While the novel coronavirus has proven to be a formidable foe, scientists have nevertheless been able to gradually understand just how it affects our bodies and what we can do to improve our chances of beating the disease.

English healthcare workers with antibodies remains relatively high with researchers suggesting it may be due to regular exposure to the virus.

The new research tested 365,104 adults, across three rounds of testing between June and September. Now, yet another study has found that being deficient in vitamin D could make you more likely to be hospitalized with COVID, increasing your chances of severe illness by 80 percent.

The waning of antibodies means immunity appears to be fading and people are at risk of contracting coronavirus multiple times. The biggest drop in antibody prevalence came in those subjects with no reported history of COVID-19.

"We suspect that the way the body reacts to infection with this new coronavirus is similar to that", she said. Ward added in a statement, "We don't yet know whether this will leave these people at risk of reinfection with the virus that causes COVID-19, but it is essential that everyone continues to follow guidance to reduce the risk to themselves and others".

Levels of antibodies within the body decline rapidly within just a few months of contracting coronavirus, a new study from Imperial College London has found.

Push to pursue COVID-19 herd immunity called 'dangerous'11 days ago2:05
Push to pursue COVID-19 herd immunity called 'dangerous'11 days ago2:05

Authorized by the Food & Drug Administration, the tests are conducted by a health professional "using a fingerstick blood sample", Kroger said.

"We can see the antibodies and we can see them declining and we know that antibodies on their own are quite protective", Wendy Barclay, head of the Department of Infectious Disease at Imperial College London, told reporters.

"Testing positive for antibodies does not mean you are immune to COVID-19", he said.

World Health Organization spokesman Tarik Jasarevic said that uncertainty over how long immunity would last, and the fact that most people had never had antibodies against the coronavirus in the first place, showed the need to break transmission chains. "If someone tests positive for antibodies, they still need to follow national guidelines including social distancing measures, getting a swab test if they have symptoms and wearing face coverings where required".

The researchers say it is unclear what level of protection antibodies give a person against COVID-19 specifically.

"So although we are seeing a decline in the proportion of people who are testing positive, we still have a great majority of people who are unlikely to have been exposed".

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