"SARS-CoV-2 was categorized as a Biosafety level 3 pathogen together with Tuberculosis, [Bubonic Plague], [Yellow Fever], and [Bird Flu]... yet unlike other diseases in its category, it has been allowed to spread, replicate, and mutate freely in the population. Seasonal respiratory infections such as Influenza, Parainfluenza, Rhinoviruses, Adenoviruses and similar are conversely Biosafety level 2 pathogens."
https://whn.global/scientific/sars-cov-2-and-covid-19-from-crisis-to-solution/