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South African COVID-19 immunity caused by previous exposure to coronavirus?

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Shavil Maddy, a professor of vaccine science at Wit University, said immune cells may have developed that provide a protective layer against viral infections, including COVID-19.

File: Professional healthcare professionals wearing personal protective equipment (PPE) in a tent dedicated to treating patients with possible COVID-19 coronavirus at the Tsuwane District Hospital in Pretoria on July 10, 2020. I am monitoring the patient. Image: AFP

Johannesburg-Experts may have exposed many South Africans to previous coronaviruses, given that they are less than planned coronavirus infections, and therefore COVID-19 (new coronavirus infection) (# If there is no character limit, add parentheses when it first appears..

When epidemiologists first modeled their predictions earlier this year, people, especially those in densely populated spaces, were at risk of rapid infection. But the numbers continue another story.

A professor of vaccination at the University of Whits, Shabilmady, said that some sectors of the population may have developed immune cells that provide a layer of protection against viral infections, including COVID-19.

In such cases, the body remembers past encounters with pathogens such as the coronavirus and is better armed to fight them.

Research is ongoing, but early research has been published. Nature In singapore To support the work of these so-called memory T cells.

Maddy, head of the SAMRC Vaccine and Infectious Disease Analysis (VIDA) research unit and principal investigator of the COVID-19 vaccine trial in South Africa, said that immunity was due to previous widespread exposure of people in high-density areas. To a common cold coronavirus that said it could have caused.

“They have been exposed and have developed this important cell-mediated immunity that helps fight the serious effects of COVID-19,” he said.

Maddy believes that 40-45% of the population is already infected with the virus.

“If there is a second wave, there will probably be an additional 15-20% infection, reaching the threshold required for herd immunity. Then there will be seasonal outbreaks in the fall and winter. “He said.

South Africa’s COVID-19 mortality rate remained much lower at just over 1% in countries where the early rapid increase in infection caused fear of health system collapse.

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