Yellow Fever

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Excerpt from Yellow Fever: Its Epidemiology, Prevention, and Control, Lectures Delivered at the United States Public Health Service School of Instruction by H. R. Carter, Senior Surgeon United States Public Health Service From the time the mosquito receives the infection from the sick man not less than 12 days must elapse before she becomes infective, that is, capable of conveying her infection to others. This period, of extrinsic incubation it was called when first discovered, is generally over 12 days, usually over 2 weeks, and varies with the temperature, being longer as the temperature falls. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully, any imperfections that remain are intentionally left to preserve the state of such historical works.