this is a chart for the 1917 and 1918 (there were two viruses, not one) pandemics:
so, there's a lot of differences.
but, these pandemics are thought to have had a total mortality rate of ~0.6%, which is a strong flu.
the total mortality rate in south korea right now is 0.8%.
i think that, in the end, the numbers will prove the claim that it's on par with a strong flu correct. that's what i've said from the start.
and, it is very clear that you want to keep old people locked up right now, even if it's just as clear that it's more or less harmless for people under 50 - in contrast to the 1918 flu, which killed a lot of young people in the midst of world war one.