The BA.2 Omicron subvariant is being pegged as being responsible for causing more than half of the COVID-19 cases in the United States, according to America’s public health agency. Estimates from the Centers for Disease Control and Prevention (CDC) updated March 29 had BA.2 as being behind 55 percent of the cases recorded in the week ending March 26. That was up from 39 percent the previous week and 28 percent the week before that. The estimates may be revised. The CDC revised the figures in late 2021 and did so again Tuesday, moving the estimates up for mid-March. BA.2 is increasingly displacing other subvariants of Omicron, a strain of the CCP (Chinese Communist Party) virus, also known as SARS-CoV-2, the virus causes COVID-19. Emerging data indicate that BA.2 is more transmissible than Omicron and other subvariants, but “there’s no evidence that BA.2 variant results in more severe disease, nor does it appear to …