recommending that people infected with covid end isolation after five days without a test, now giving new guidance yet again, for americans who can and want to test. if it s positive, isolate another five days. if negative, leave isolation, but wear a mask and avoid high risk activity. the cdc says a negative rapid test does not guarantee you can t spread the virus. this is all about the fact that there s just not enough tests. they do work to eye dent goin day jousness. the reality is that if every american had access to five tests at home, we wouldn t be having this conversation. reporter: omicron is now making up 95% of cases in the u.s. and today, the president telling unvaccinated americans they have reason to be alarmed. some will die, needlessly die. unvaccinated are taking up hospital beds and crowding emergency rooms and intensive care units. reporter: and the president today announcing he was doubling the purchase of pfizer s