New COVID Strain May be More Contagious Than Omicron, WHO Says – NBC Chicago April 3, 2022April 3, 2022
What is BA.2 or ‘Stealth Omicron’? What to Know as Cases Abroad Spark Concern – NBC Chicago March 19, 2022March 18, 2022
Experts explain what’s making BA.2 omicron subvariant more contagious than the original January 31, 2022January 30, 2022