While both are viruses, there are sweeping differences. The big takeaway? We know oodles about the flu and have tons of mechanisms and tools to fight it, and the death rate from the flu is nothing compared to Covid-19.
Any microorganisms which is target the immune must take serious it could be bacteria, fungus, virus, viriod etc. Our body has self defense mechanism but it works well when we will provide proper Level of Nutrition and Exercise. Seasonal Vaccinations has probability to bother the Metabolic activity and self healing mechanism that’s one of the reason Doctor don’t want to do it. Above all It is an experiment to use Alternative Seasons Vaccines on Human Body.