Solved by KFrank in post #2 
              
              
                Hi Sam! 

You do not need (or want) a “None” label.  The “None” case is indicated 
by none of your four given labels being active. 
You have a multi-label, multi-class classification problem.  It is 
multi-class because you have four classes, “Hospitalized,” “Intubated,” 
“Deceased,” and “Pneumonia.…