Vitamin A is found in MILK FAT. This means there is a huge difference between Vitamin A content in whole milk vs skimmed milk.

"Absolute concentration of vitamin A was reduced from 208.830 ± 0.083 μg/L in whole milk to 35.855 ± 0.046 μg/L in skimmed milk."

=> WHOLE MILK CONTAINS NEARLY SIX TIMES MORE VITAMIN A THAN SKIMMED MILK.

If the theory that measles mortality was reduced by Vitamin A in milk is correct (via defence against bacterial pneumonia, etc.), then it suggests that elderly people should NOT take skimmed milk, but whole milk.