This is the second episode to deal with Korean Hemorrhagic Fever. The first was "Soldier of the Month" (1975), where Frank Burns comes down with the illness. While given a much lighter treatment than in this installment, the previous episode featured a card at its close that gave a brief history on the real disease, which was indeed diagnosed during the actual Korean War.
The line Charles was reminded of having used while drunk, "Come live with me and be my love, and we will all the pleasures prove" is from the poem "The Passionate Shepherd to his Love" by Christopher Marlowe.
At the party, Margaret holds up her drink, calling it "a bouquet of Four Roses." Four Roses is a brand of bourbon made in Kentucky.
First time since being assigned to the 4077th that Charles successfully returns to Tokyo. In "They Call the Wind Korea" (1978), he was granted leave to Tokyo, but a severe windstorm foiled his plans.
0.9% sodium chloride is said to have the same sodium concentration as blood, which at the time was the accepted belief, however, more recently it has been discovered that whole blood contains 0.6% sodium.