Upon first inspection, the mutations in the highly contagious delta covid variant don’t look that worrisome. For starters, delta has fewer genetic changes than earlier versions of the coronavirus. “When people saw that the epidemic in India was driven by delta, they did not suspect it would be so bad or overtake other variants,” said … Continue reading Delta Variant Wasn’t Expected to Be So Bad. Biologists Now Worry. Its Mutations Make it the Most Transmissible Covid Virus Yet