Good catch on the numbers, but the diagnosis remains the same: generalized obtusity and catastrophic unpreparedness.
As for military camps, very topical considering the 1918-19 "Spanish Flu" and it's mysterious origins:
one interesting theory. It may or may well not be relevant, but there were about 100,000 men of the Chinese Labour Corps in France IIRC.
Certainly there has been a slow continuum of improvement since the US Civil War for example. At the same time, I'm personally convinced that there are many herbals that are highly effective, and as far as war was concerned sadly a great many men and limbs could probably have been saved that weren't.
I don't believe the authorities ever accepted the fact, but there's plenty of evidence that malaria was found in certain regions of NW France in 1917-18 and maybe earlier. It's been suggested it came with the Indian Army Corps in 1915, but there were so many
British
reservists who had served in India there as well probably no one could say where it came from.