An Uncle of mine died in 1918 of that flu. He was a cadet at West Point and he is buried there. From what I've been reading here and on the Marburg surveillance thread, there is a vast difference between the petechia of 1918 and the petechia seen in various serious illnesses and the diffuse bruising being seen today where there is disintegration of tissue and bleed out often before the patient gets to pneumonia. In many cases the body has dissolved within 3 or 4 hours postmortem.
Last year, China, in vested uranium interest, did send peacekeepers into the region of Angola (where an outbreak started as a Marburg variant that appeared more like Ebola.) At the time I wondered if they were there to collect samples as well.
The Marburg samples collected in Angola were confirmed Marburg by the CDC, in the US. The CDC was the first place to get samples.