Doctors arrive in the Canal Zone, hoping to eliminate Yellow Fever. It's an international group, with two American men one British doctor, one Mitteleuropean, and one Japanese, in the middle of the jungle under the command of Dr. Ian Keith.
It's a well-meaning Grand National picture, written and directed by Karl Brown. Brown clearly had some serious things to say about the March Of Progress, but he also knew that his audience wanted some romance, some death defying, and a goodly amount of all around melodrama and some comic relief that kept to the main point. the script provides all of that, with the doctors valiantly fighting for the honor of conquering death, Tala Birell (the Mitteleuropean doctor) and Suzanne Kaaren in a low-key match-off for his affections, and Ferdinand Munier as the pompous senator,
It's a little more strident than my taste calls for, and Hugo Riesenfeld provides a pompous little march to presage the doctors as they stride forward to carry out their glorious mission. You can say, however, that it is well-meaning, like the biopics that Warner Brothers were producing for Muni and Robinson at this point.