Control of Communicable Diseases Manual, 20th Edition, is the must have resource for anyone in the field of public health. Every chapter has been reworked and new chapters have been added. The 20th Edition is a timely update to a milestone reference work, ensuring the Manual's relevance and usefulness to every public health professional around the world. Each disease chapter is presented in a standardized format that includes the following information: Disease name. Clinical features. Causative agent(s). Diagnosis. Occurrence. Reservoir(s). Incubation period. Transmission. Risk groups. Prevention. Management of patients. Management of contacts and the immediate environment. Special considerations.