Yes, supplementing with Vit A helps immensely. There was actually a study done in Africa on kids with mealses. Control group got nothing. One group got Vit A and the other group got fever reducers. The highest mortality was in the group that took the fever reducers (we NEED fevers, fever is your friend, it helps you to fight infection), even the group the got no intervention had better survival than the fever reducer group. The group tht did the best, and by a long shot, was the group that got Vit A.