protection. during that second half of a ten-day period. when you balance that against. the importance of trying to get people back. functioning in society. the alternative is something that no one wants. that is to shut down completely. we know that is not going to be palatable to the american public. that is something you want to be avoiding. so how do you get people back to function in society. not with a zero risk, but with a markedly diminished risk. >> today dr. rochelle walensky, the director of the cdc, echoed with doctor fauci told me. spoke about the cdc's no quarantine guidelines. how the intention was to strike a balance between minimizing risk and matt customizing compliance among a pandemic weary population. >> it really had a lot to do with what we thought people would be able to tolerate. we have seen relatively low rates of isolation. for all of this pandemic.