The Young Indiana Jones Chronicles #8 (1992)

Indy and Remy have crossed the African contintent, been threatened by disease, and are now in the hands of a German -- but one devoted to their recovery, not their deaths. Albert Schweitzer, the renowned physician and humanitarian, is in Africa trying to save the world's most precious treasure: human lives. Unfortunately, there's a war going on, and the other side doesn't see his value, just his nationality.