There is a Netflix documentary called Pandemic about couple that is trying to eradicate flu. They found vaccine that works on all flu viruses but it takes 6 shots to work. That’s not practical at all therefore it’s not on the market yet.
I now have the same for covid, lol - but I'm overweight and 41, high risk as a result, and have two kids under 4 I'd like to see make it to graduation.
I have a constant nasal drip, that I don't think is flu related, I get the vaccine every year, but I do get bronchitis like every other year and it wipes me out for at least 2-4 weeks.
Conspiracy glasses on, what if the annual flu vaccine manufacturers are actively preventing a universal vaccine from happening? It's a big recurring source of income for them after all.