Americans have high enough immunity to ward off the threat posed by the BA.2 Omicron COVID-19 variant to some extent, according to Rochelle Walensky, director of the Centers for Disease Control and Prevention (CDC). “The high level of immunity in the population from vaccines, boosters, and previous infection will provide some level of protection against BA.2,” Walensky said during a press briefing by the White House COVID-19 response team and officials from the Department of Health and Human Services (HHS) on April 5. “Looking across the country, we see that 95 percent of counties are reporting low COVID-19 community levels, which represent over 97 percent of the U.S. population,” she said. Health officials said BA.2 is estimated to account for 72 percent of all circulating COVID-19 variants in the country. All regions of the United States have reported the strain to be the dominant variant, the CDC director said. At …