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Hong Kong’s 12 days of more than 100 infections

Hong Kong’s 12 days of more than 100 infections

A drop of blood is needed for the Covid-19 antibody test.
A drop of blood is needed for the Covid-19 antibody test. Photo: Valerie Macon/AFP/Getty Images

Seven months into the coronavirus pandemic, the scientific community has learned many things about the SARS-CoV-2 virus and the disease it causes, Covid-19.

But there are still many gaps in our understanding.

One big mystery: Why do some people get very sick and even die from their illness, while other similar people show no symptoms and may not realize they’ve been infected at all?

We know some of the big factors that put people at higher risk of having a severe, even fatal, course of disease: being over 60; being overweight or obese; having one or more chronic diseases such as diabetes, cardiovascular disease, kidney or lung disease, and cancer; and being a person of color — Black African American, Latino Latinx or Native American.

But might the opposite also be true: Could certain people actually have some type of protection?

A recently published summary article in the journal Nature Reviews Immunology put forth a tantalizing possibility: A large percentage of the population appears to have immune cells that are able to recognize parts of the SARS-CoV-2 virus, and that may possibly be giving them a head start in fighting off an infection. In other words, some people may have some unknown degree of protection.

“What we found is that people that had never been exposed to SARS Cov2 … about half of the people had some T-cell reactivity,” co-author of the paper Alessandro Sette from the Center for Infectious Disease and Vaccine Research at La Jolla Institute for Immunology, told CNN.

Read more here.

Published at Sun, 02 Aug 2020 04:00:46 +0000

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