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Is the U.S. in a summer COVID surge? Cases are rising in these 25 states
COVID-19 cases are rising in half of U.S. states. What to know about COVID trends and the new Stratus and Nimbus variants.
All about the 'Nimbus' and 'Stratus', the new COVID variants monitored closely by WHO
Scientists are closely monitoring the rapid global spread of two new Omicron subvariants, Nimbus (NB.1.8.1) and Stratus (XFG) ...