<span style="color: black;">The US Centers for Disease Control and Prevention on Saturday clarified coronavirus advice for U.S. schools and recommended the continued, universal use of masks and physical distancing.<br />'' <br />''This clarification came after the agency's sudden announcement that vaccinated Americans could forego masks indoors.<br />'' <br />''All schools teaching students from kindergarten through grade 12 should continue to implement proper mask-wearing through the end of the 2020-2021 school year.<br />'' <br />''The agency also kept in place its suggestions to observe physical distancing and to test for coronavirus infections.<br />'' <br />''About 122 million people had been fully vaccinated against Covid-19 in the U.S. as of today, but the average number of vaccinations per day has dropped since its peak in April.</span><br />''<br />