re: Broadway star Nick Cordero dead after 90 days in ICU for covid19

Is there a better explanation than article in OP in this thread on when negative tests were and when positive test or tests were?

Article uses 3rd test positive but then throws in negative test after amputation of leg and positive test announce in early May.

I am guessing 3 tests were early and then had a negative like he was getting better initially after amputation but later tested positive again, but article wasn't clear (it could be ad settings in Brave causing formatting to mess up article a lot and just missed details). They also mention machine used to help heart and lungs stopped circulation to leg causing amputation a week later after earlier saying it was a Wuhan complication like clots some patients are getting.

One thing that seems to have changed in treatment from his March 31st admission is immediately going to ventilator versus trying oxygen with shifts to prone position. I know this started back in March, but I am kind of wondering when tests were including first positive and if possible he caught it in hospital and if it was the machine or the virus that directly caused leg problem.