This is a game where you're trying to guess which human-infecting
virus the computer has chosen. Each time you guess the computer will
reveal the lowest taxonomic clade that they both belong to. For
example, SARS and Influenza are both RNA viruses that use RNA polymerase, so
if you'd guessed SARS and the answer were the Flu then it would tell you
they were both Orthornavirae (RNA Polymerase Viruses).