BA.2

https://www-cbsnews-com.cdn.ampproject.org/v/s/www.cbsnews.com/amp/news/covid-omicron-ba2-variant-interest/?amp_js_v=a6&amp_gsa=1&usqp=mq331AQKKAFQArABIIACAw%3D%3D#aoh=16432524215065&referrer=https%3A%2F%2Fwww.google.com&amp_tf=%E4%BE%86%E6%BA%90%EF%BC%9A%251%24s&ampshare=https%3A%2F%2Fwww.cbsnews.com%2Fnews%2Fcovid-omicron-ba2-variant-interest%2F

https://www.health.com/condition/infectious-diseases/coronavirus/ba2-stealth-omicron-sub-variant