influenza IS A deadly pathogen. our healthy immune system mounts cooridinated defenses which typically prevails when strong, but dont minimize it. and as mentioned it mutates/seeks or probes weak cellular entry pts for faulty def mechanisms. it learns or adapts to our responses to our synthetic,weakened clone creations which mimic the pathogen...adaptation in action. War.
wash your hands often, stay healthy, get outside,avoid coughers and large groups where possible,eat well , live in bubble if you must.