Why are there so many new Omicron sub-variants, like BA.4 and BA.5? Will I be reinfected? Is the virus mutat.. - ETHealthWorld
2:45am PDT - May 9th, 2022 health - The Times of IndiaWe are also increasingly hearing about new Omicron sub-variants with names such as BA.2, BA.4 and now BA.5. The concern is these sub-variants may lead to people becoming reinfected, leading to another rise in cases.