Spanish Flu and HIV, also keep in mind that there were less people in the world so you have to go based on ratio to present day not just numbers(but even then the numbers still beat Covid. Aside for the fact that we already know that the Covid numbers are extremely inflated due to labeling every hospitalized patient or death as a Covid case regardless if it was or wasnt and even the WHO admitted that.
“Stop with your binary thinking. A vaccine isn’t either 100% effective or 0%.”
-So whats your solution