robocall@lemmy.world to HistoryPorn@lemmy.worldEnglish · 9 months agoSpanish Flu 1918lemmy.worldimagemessage-square24fedilinkarrow-up148arrow-down11
arrow-up147arrow-down1imageSpanish Flu 1918lemmy.worldrobocall@lemmy.world to HistoryPorn@lemmy.worldEnglish · 9 months agomessage-square24fedilink
How do we know that?
Science.