Whodunnit {abridged}

Was SARS-CoV-2 or Pneumonia the primary cause of respiratory Covid-19 deaths?

A ‘whodunnit’ (a colloquial elision of "Who [has] done it?") is a complex plot-driven variety of detective fiction in which the puzzle regarding who committed the crime is the main focus. The reader or viewer is provided with clues to the case, from which the identity of the perpetrator may be deduced before the story provides the revelation itself at i…