The Chinese People's Liberation Army (PLA) suffered a large number of medical casualty in the North Bank area of Pangong Tso near Line of Actual Control (LAC).
According to the sources, the cases of casualty evacuation has spotted in the area over the last week or so. That means soldiers are taken out on a stretcher.
The altitude and the falling temperature in Ladakh area have much to do with it. The temperature is below freezing point in the night. Altitude hights 15,000 to 16,000 feet high and soldiers occupying the peeks and the Chinese there are about 5000 soldiers occupying the area, thus it will lead to a high number of people falling sick.