Allied Killed, wounded and prisoners:
531,000 French
411,636 British Empire
127,000 American
Total: 1,070,000

German Killed and wounded:
785,733
Total prisoners:
386,342
Total: 1,172,075

British forces took 188,700 prisoners and captured 2,840 guns
French forces took 139,000 prisoners and captured 1,880 guns
American forces took 44,142 prisoners and captured 1,481 guns
Belgian forces took 14,500 prisoners and captured 414 guns
http://www.worldwar1luton.com/event/...days-offensive

The Spanish Flu took out ten to twenty five times more humans.

In just 18 months at least a third of the world’s population was infected. Estimates on the exact number of fatalities vary wildly, from 20 million to 50 million to 100 million deaths. If the upper end of that estimate is accurate, the 1918 pandemic killed more people than both World Wars put together.
https://www.nationalgeographic.com/a...-flu-pandemic/