In March 2020, New York City’s hospitals filled up with patients desperately ill with Covid-19. In many cases, when their fluid-filled lungs could no longer give them oxygen, doctors sedated them and put them on ventilators.

The patients who recovered were taken off the machines and anesthesia. Within a day or so, their doctors expected them to wake up.

People who caught mild Covid had increased risk of blood clots, British study finds

People who caught mild cases of Covid-19 during the first year of the pandemic had a higher risk of developing blood clots than those who were not infected, according to a large study published by British scientists this week.

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The scientists said their findings highlight the importance of monitoring even people who had mild Covid for cardiovascular disease over the long term.

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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.  ...