4 ms·550,000 would have been about 0.5% of the US population in 1918.by jayess 9y ago550,000 would have been about 0.5% of the US population in 1918.ghaff 9y agoI think the parent is conflating two different numbers. It looks like about 675,000 died in the US and about 25% got sick.pvaldes 9y agothanks for the correction