Are once again on the rise. with the omicron sub variant, the most common strain of the united states, accounting for about 86% of cases, according to the cdc. now, two other subvariants of the omicron strain are spreading in parts of the country. some areas, such as philadelphia, reinstating indoor mask mandates among the latest surge. with that city seeing an almost 50% rise in cases in just ten days. the cdc has extended the mask mandate on planes and trains threat at least may 3rd. one bit of bright news, the fda has authorized the first covid-19 breath test, which could provide results in...