Health
How a cold protects you from COVID
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Article Science Much attention has recently been given to explaining why COVID-19 is deadly to some, but virtually unnoticed to others.
Scientists at the La Jolla Immunology Institute in California have shown that infection with the common cold coronavirus can generate immunity response It resembles a major part of the immune response generated by SARS-CoV-2, the virus that causes COVID-19. This can reduce the severity of COVID-19 when infected with one of the former mild coronaviruses. But how likely is this? And how does this relate to what you already know about coronaviruses?
a few weeks ago, Another article Sat at the center of the discussion of SARS-CoV-2 immunity. This indicates that the antibody response to SARS-CoV-2 may decline over time.
The findings were concerned that SARS-CoV-2 can infect people multiple times and that the vaccine may not produce lasting protection. However, in this article, we focus on only one arm of the immune response, the B cells, antibody Helps eliminate infectious diseases.
T cells also Immune reaction Against viruses. They play various roles in helping B cells mature into disease-fighting machines. The article by Jose Mateus and his colleagues at the La Jolla Institute for Immunology is important. It isolates T cells from coronaviruses that are mild enough for people to potentially interact with new challenges by SARS-CoV-2, and their T cell Recognizing SARS-CoV-2, infection..
Reasons for cross immunity
For epidemiologists, the weakness and evidence of weakness was not surprising. Research since 1990 Soldiers infected with one of the milder coronaviruses have shown that they have not been immune for more than a year. Also, the boom bust cycle that the mild coronavirus experiences each year Can explain By a mixture of fading and cross immunity.
The milder coronavirus can produce antibodies similar to those produced by that coronavirus. Causes SARS and Mers.. These antibodies are so similar that tricked A health facility in British Columbia believed that there was an outbreak of SARS after the SARS outbreak was declared. In fact, the outbreak was caused by OC43, one of the cold-causing coronaviruses.
Nevertheless, infections that produce structurally similar antibodies do not necessarily provide cross protection in a medically meaningful way.
Still not sure
There is poor evidence of all cross protection except the most closely related coronavirus.
It is difficult to determine if a mild coronavirus protects against SARS-CoV-2. Ideally, Historical data Identify communities that have experienced large outbreaks of each mild coronavirus strain in the past few years and determine if they are associated with less severe COVID-19 cases.
Challenge studies in which a person deliberately becomes infected with a milder strain of coronavirus and is subsequently exposed to SARS-CoV-2 may also address the problem, but it is dangerous and unethical. For the time being, the possibility that common coronaviruses protect against SARS-CoV-2 remains that possibility. Indeed, Matheus and colleagues describe the theory as “very speculative.”
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Quote: Coronavirus: How a Cold Protects You From COVID (2020, Aug 12)
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