[weaksauce]

the flu would be way more deadly than it is if there wasn't a seasonal flu shot that gives herd immunity.

edit: it shouldn't be controversial to say that a thing that kills 30-80k per year with active measures of mitigation already something that would be more deadly without a vaccine. seriously reflect on that. the corona virus is something we need to take 100% seriously but also acknowledge that the flu is also very deadly... even more so without any mitigation (thankfully we have for the common flu)

[arcticbull]

The flu probably wouldn't be dramatically worse if we didn't have a vaccine. The vaccine isn't particularly effective all things considered, ranging from 10% to 60% depending on the year and how well scientists were able to guess which strain would be predominant.

The flu as-is causes 45,000,000 sicknesses every year in the US alone.