it says right on the top
and the only way the numbers drop like that is if everyone is properly social distancing, which isn't remotely happening.
You can take these numbers as a best case scenerio, and if you want to believe that will be how it will be feel free.
but there is no logical reason to believe that these numbers are remotely accurate given what we have seen from other countries and the state a lot of these places are already in.
for example they are projecting only 6770 total deaths for Florida.
while it's over 15k for new york. and quite frankly given how Florida has handled this it's going to be much worse than New York.
the study is adjusted for when they started the order and where they were at when they started, but it assumes a 100% shelter at home following in general.