COVID-19 immunity may last years, suggests new data

Coronavirus antibody test

Antibodies, after all, are just one facet of the body's complex immune system, and the new study indicated that other factors like T cells showed only a slight decay several months out from infection, while B cells, which produce new antibodies as needed, had actually grown in number in most participants.

Another recent study highlighted the importance of T cells response as they were detected in individuals who contracted SARS 17 years after the initial infection, according to the study.

Prof Shane Crotty, who led the study at La Jolla Institute of Immunology, said: "That amount of memory would likely prevent the vast majority of people from getting hospitalised disease, severe disease, for many years". The data indicates that most people who were infected with the virus and then recovered since the global pandemic started over eight months ago still hold immunity to the virus.

The highest COVID-19 viral load was detected early in the course of the disease - at the time symptoms begin, or before day five of symptoms.

Coronavirus: Nearly 70 rapid COVID-19 testing devices deployed to rural and remote communities, officials say Indigenous Services Minister Marc Miller and Dr. Tom Wong, chief medical officer of public health for Indigenous Services Canada, discussed rapid COVID-19 testing on Thursday, saying that Canada has deployed close to 70 devices in rural and remote communities, which are "either in Indigenous communities or very close to them". Pfizer said it expects to make up to 50 million vaccine doses this year - enough to inoculate 25 million people - and up to 1.3 billion doses in 2021.


But this takes time while studies suggest it takes about 10 days to start making antibodies that can target the coronavirus and the sickest patients develop the strongest immune response. The upper respiratory tract is believed to be the main source of transmission since COVID-19 is largely spread through particles that enter the air. In everyone, the diaphragm muscle cell membranes contained a protein called ACE2, which the new coronavirus uses as an entryway into cells. Moving forward, to enhance hospital outcomes for elderly COVID-19 patients, further studies must be conducted to determine if delirium is preventable in this cohort and what intervention strategies would be effective in protecting the elderly from developing the cognitive syndrome. He said the diaphragm damage may help explain why it is often hard for COVID-19 patients to breathe on their own again after they have been on mechanical ventilators in the ICU.

The team collected data from seven sites across the USA, assessing a total of 817 patients with a mean age of 77.7 years.

Researchers also found that viral loads appear to be similar among COVID-19 patients with and without symptoms.

There were 79 studies, with a total of 5,340 patients, with 58 studies in China, and 73 studies including hospitalized patients only. "We do not know that for certain yet, but it is encouraging", said Evans. They said the studies included different populations who were followed up and managed differently. Furthermore, some patients may have delayed calling for help over concerns of becoming infected with the coronavirus.

Open https://tmsnrt.rs/3a5EyDh in an external browser for a Reuters graphic on vaccines and treatments in development.

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