Korean War US 7th Army Long Sleeved Shirt (Soldier Identified)

For sale is a rare US 7th Army long sleeved shirt. The garment has two (2) dark red-colored blood droplets (see photo) clearly visible on the inside of right sleeve.

There is a small sized brown-colored stain on the back of the garment. There are two (2) US issued dry clean tabs that is stamped, 55?