Knowledge Science

Here's why one SARS-CoV-2 variant still reigns supreme : Shots - Health News : NPR

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Has the evolution of the virus finally started to ebb, possibly making it more predictable?

The answer — according to a dozen evolutionary biologists, virologists and immunologists interviewed by NPR — is no.

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The main COVID symptoms have changed, research shows | The Hill

 ... like all viruses, the primary symptoms associated with COVID have changed and can vary based on your vaccination status, according to a new list released last week.

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Researchers have found that for participants in all three groups — fully vaccinated, those who received just one dose, and unvaccinated — four of the five most commonly reported symptoms are the same: sore throat, runny nose, persistent cough, and headache.

Their prevalences across the groups, however, vary, as does the fifth symptom.

For those who are vaccinated, a blocked nose is the third-most frequently reported symptom. Among the partially vaccinated, it’s sneezing, and the unvaccinated, fever.

Below are the symptoms most commonly reported among the three groups, ranked in order of how often they are reported.  ...

Mounting evidence shows autoimmune responses play a significant role in long Covid Recent research suggests people with long Covid are more likely to have markers of autoimmune disease in their blood a year after infection. NBC News

Disease experts say it has become increasingly clear that an autoimmune response, in which antibodies attack the body’s own healthy cells and tissue, plays an important role in some long-Covid cases.