>Most droplet born viruses are very contagious (e.g. efficiently infect a target). Is that your own co-relation? For e.g. Influenza Type B versus Influenza ty

>Most droplet born viruses are very contagious (e.g. efficiently infect a target). Is that your own co-relation? For e.g. Influenza Type B versus Influenza type C. Type C is not as contagious and the seasonal flu vaccine does not cover it. >Rubeola, pertussis, and TB are all incredibly infectious (R0 > 10) because they are truly airborne. They essentially can survive and still be very infectious in a desiccated form that can float in the air for a long time. Being contagious doesn't directly co-relate to being equally harmful. For e.g. Most healthy adults can easily deal with TB. The numbers shift, but approximately over 40% of the Indian population is infected with TB.