As an infectious disease specialist, I would like to say first that, for the most part, this is not a particularly useful exercise from a medical perspective. Influenza has treatment with anti-virals and a moderately effective vaccine. Plus, because it circulates every year in life-threatening form, much of the population walks around with some level of immunity.
In contrast, we have neither anti-virals nor a vaccine for COVID-19. Furthermore, though regular coronaviruses circulate every year (they are a leading cause of the common cold), the newer strains (SARS and COVID-19) are completely unfamiliar to our immune system. Right now, it appears that no one has a shred of preexisting protection (except those already infected and recovered).