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• Expect more worrisome variants after Omicron, scientists say

  Get ready to learn more Greek letters. Scientists warn that Omicron's whirlwind advance practically ensures it won't be the last version of the coronavirus to worry the world.

  

• Trying to kick sugar? Artificial sweeteners may not curb cravings, study suggests

  New research shows that the cells in your gut can tell the difference between sugar and artificial sweeteners—even if your taste buds are oblivious— providing evidence as to why sugar cravings can be so hard to kick.

  

• Hospital defends pig heart transplant amid patient's criminal past

  A Maryland hospital is defending its decision to transplant a pig's heart into a dying man following reports that the patient had a criminal past, saying his eligibility was 'based solely on his medical records.'

  

• Stronger evidence linking virus to multiple sclerosis: study

  There's more evidence that one of the world's most common viruses may set some people on the path to developing multiple sclerosis.

  

• U.S. health officials encourage more Americans to consider N95 and KN95 masks

  U.S. health officials on Friday encouraged more Americans to wear the kind of N95 or KN95 masks used by health-care workers to slow the spread of the coronavirus.

• Duck is 1st wild bird flu case in U.S. in five years, scientists say

  A duck killed by a hunter in South Carolina had a contagious and dangerous bird flu that has not been detected in the wild in the U.S. in five years, officials said.

• Severe COVID-19, newborn deaths more likely among pregnant people when unvaccinated: study

  A new study has found that pregnant people were more likely to see severe outcomes of COVID-19 and more likely to lose their baby if they weren't vaccinated.

• 1 in 10 people may still be infectious after 10 days with COVID-19, new study suggests

  A new study suggests that 10 days of quarantine may not be enough after finding one in 10 people may still remain infectious even after that point.

• Did your child's eyesight worsen during pandemic? Study says a special lens might help

  An optical defocus lens treatment helped slow the progression of near-sightedness in children particularly during the pandemic lockdown, a new study published on Friday suggests.

• Schizophrenia tied to brain cell development: study

  Clues to how psychiatric disorders like schizophrenia originate can be found in the early development of human brain cells, according to a new study.

• Some nurses still don't have proper COVID-19 personal protective equipment: union

  When news of the first cases of COVID-19 began cropping up in Canada in early 2020, Linda Silas was one of the first to ring alarm bells about the lack of proper personal protective equipment for health workers.

• The not-so-ugly truth about face masks and attractiveness

  A study conducted during the COVID-19 pandemic in the United Kingdom suggests medical masks boost a person's facial attractiveness, highlighting a possible link between face coverings and perceptions of being responsible or caring during the global public health crisis.