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Assessing ‘super immunity’ Covid claims
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Following three years of navigating a pandemic, there are still a group of
fortunate people who have never tested positive for Covid. This escape of
infection despite repeated exposure deserves further analysis, and
perhaps pinpointing genetic cause(s) associated with
this heralded
super immunity
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Key takeaways
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"We are searching for rare genetic variants that make people
resistant to SARS-CoV-2 infection," said Dr. Jean-Laurant Casanova,
a pediatric immunologist, geneticist and professor at Rockefeller
University in New York. "If we were to discover them, the impact
would be significant."
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"There's a couple of genes that have our attention," said Dr. Andras
Spaan, a clinical microbiologist on the team. "One of them, of course,
is ACE2," a gene known to help Covid infiltrate the body.
An opposing
genetic component may exist that prevents ACE2 or similarly
functioning genes from allowing a Covid invasion.
To identify those
protective measures would mean getting closer to developing drugs
designed to prevent infection and further spreading of the disease.
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Jill Hollenbach, a professor in the department of neurology, as well
as the department of epidemiology and biostatistics at the
University of California, San Francisco, attempts to identify the
underlying pathomechanisms explaining asymptomatic Covid
cases.
To do so, her lab has identified human leukocyte antigen, or
HLA, as a target to focus on.
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By the digits
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676 million people around the world have been infected with Covid
since March 11th, 2020.
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60% of the U.S. population has had Covid according to the CDC.
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>40% of cases could be asymptomatic.
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2 times as likely to have an asymptomatic infection with
one copy of
the HLA-B*15:01 gene
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>8 times as likely to have an asymptomatic infection with
two
copies of the HLA-B*15:01 gene
.
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