'Stratus' COVID-19 strain surges in Bay Area as vaccine rollout sows confusion
The XFG "Stratus" COVID-19 strain now dominates Bay Area infections, is more transmissible, causes varied symptoms, and coincides with high disease levels as schools reopen.
Black Death Plague That Killed Millions Became Less Fatal because of This Genetic Tweak
Our findings in this study characterize a case in which a pandemic-causing pathogen has independently evolved to cause what we believe is a slightly weaker form of the disease.