Statement on Omicron sublineage BA.2
https://www.who.int/news/item/22-02-2022-statement-on-omicron-sublineage-ba.2Covid-19 Live Updates: BA.2, Vaccines and More News - The New York Times
https://www.nytimes.com/live/2022/04/15/world/covid-19-mandates-cases-vaccineNew COVID variant detected in at least 40 different countries | WPEC
https://cbs12.com/news/local/new-covid-variant-detected-in-at-least-40-different-countries