Keep schools open, mandate vaccines for all federal employees, and increase testing—these are three of the goals President Joe Biden outlined today during a briefing on America's ongoing battle against COVID-19.The plan was delivered during a fourth surge of virus activity fueled by the highly contagious Delta (B1617.2) variant and a stagnant national vaccination campaign that's stalled at 53% of the US population vaccinated against the novel coronavirus."What more do you need to see?" Biden asked the 80 million Americans who are still unvaccinated. "The vaccine is FDA-approved, over 200 million Americans have gotten the shot.