Does it make people sicker? Does it evade vaccines' protection or reinfect survivors? There are lots of guesses but little hard evidence as scientists race to find answers for Omicron variant of Covid-19. Know more about the variant and other issues in our top headlines this morning.
Vaccination is critical: Mysteries of omicron could take weeks to untangle
Vaccination is critical: Mysteries of omicron could take weeks to untangle
A pandemic-weary world faces weeks of confusing uncertainty as countries restrict travel and take other steps to halt the newest potentially risky coronavirus mutant before anyone knows just how dangerous omicron really is. Read more
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