Do COVID Vaccines Work? (part 12)

I utilise data from an unknown NHS Trust in the development of a staged multivariate logistic regression model in the prediction of acute respiratory conditions

I left this series hanging in part 11 after being holed below the waterline in my attempt to analyse adult symptomatic COVID in-hospital death over the period 2021/w10 – w37. This aborted attempt followed a suggestion made in part 10, this being:

My next move is to throw away the rather ambiguous meringue of a dependent variable (COVID Dx) and replace it…