Among war-time problems is the potential danger of introduction of yellow fever into the southern United States. This threat, made serious by the advent of international air travel, has been greatly increased by the dislocations and confusion of war. The Public Health Service, which is charged with the exclusion of quarantinable diseases, has become so much concerned that it has gone to some lengths to organize a workable and effective control program, ready for immediate operation on short notice.
QUARANTINE MEASURES Since the recession of yellow fever into the vastnesses of the interior of South America and Africa, ship transfer of the disease has become unlikely, and quarantine measures directed against ships have been greatly reduced. Airplane traffic, however, is another story, and offers a real danger of introduction of the disease.
There are two avenues through which infection may be brought. One is an infected mosquito that may be carried in the cabin of an airplane coming from infected areas.