i.d they evan tell to us stand three feet apart from each other so, kate, this is a really strict situation >> all right matt bradley, stay safe, thank you. i want to bring dr. jen back in again. i will keep doing this to you. so nations in europe taking these drastic measures to really locking down whole countries in this country, we have local and state governments taking the lead and doing different things. it's a real patchwork. do public health officials wish it could be more of a national policy >> you are right our system is set up as patchwork facility preparedness experts say if we can get something unified, it will make things easier, we can make decisions quicker and implement things faster. >> thank you in the midst of all of this, the 2020 presidential campaign does continue tonight, joe biden and bernie sanders will meet in washington, d.c. for their first one-on-one debate. but without an audience as a precaution against the coronavirus. garrett haake has more from washington for us. what can we expect >> reporter: tonight's debate will be the first debate done not in front of a live audience in 60 ye