Case fatality rate ( CFR ) - an indicator equal to the ratio of the number of deaths from a disease to the number of patients with this disease for a certain period of time. That is, if CFR = 30% it means one died, two cured out of 3 infected.
The percentage change between recovered cases
The percentage change between deaths
It can be assumed that if we consider bitcoin as a store of value, then when the situation getting worse ( CFR + deaths difference increase and recovery difference decreases) bitcoin price tends to rise and vice versa.
But this is only an assumption that requires additional tests; there is still little data for a robust statistical analysis.