Public health

Hanson discusses yellow fever cases in Peru.

Hanson writes about resuming his yellow fever work in Mexico. He discusses the ramifications, both personal and financial, that such a decision would entail. He comments on the political situation in Mexico.

Hanson informs Carter that he plans to go to Africa to fight yellow fever.

Hanson reports on a yellow fever epidemic in Peru. The local newspaper is publishing articles denouncing his sanitary campaign.

Hanson writes about the vaccine being sent to Peru. He is concerned about funding.

Hanson reports on yellow fever work in Peru and comments on his employees, interpersonal issues, funding, and problems with steamship companies.

Hanson sends Carter a copy of a letter reporting on the yellow fever work in South America.

Hanson sends Carter a copy of Hanson's letter to Rose reporting on yellow fever work in Peru, and asks if Carter agrees that the situation seems nearly under control.

Hanson includes the names of medical personnel and the places he has inspected. He mentions the lack of cooperation from locals. He is considering a return to the U.S.

Hanson discusses ways of converting funds into dollars. He reports on field work done by various experts. He mentions funding issues concerning the Peruvian government.

Hanson discusses a yellow fever outbreak in Trujillo. He mentions the difficulty of doing prophylactic work in Lima. He offers his opinions regarding a member of the Panama Canal Health Department and the Peruvian government.

Hanson hopes that there will be no more yellow fever cases after the year 1921. He describes his field work in detail: the use of fish to combat mosquito breeding was very successful but the limited use of containers was difficult to enforce. He praises several inspectors for their good work.

Hanson reports on the investigation of a possible yellow fever case. He describes his field work and discusses personnel matters. He hopes to bring the campaign to an end by the spring of 1922.

Hanson refutes Dr. Arces' theory that yellow fever does not exist in Peru. He expresses confidence in the work being done.

Hanson details the progress against yellow fever in Peru, but notes that the situation in Mexico and Central America is more serious than once thought.

Hanson believes that the yellow fever epidemic along the Peruvian coast has been contained.

Hanson reports on mosquito larvae studies in Peru. He also discusses, at length, administrative and political issues related to his work.

Hanson discusses his career options in Peru and Africa. He mentions the possibility of leaving public health.

Hanson requests Carter's advice regarding the yellow fever campaign in Peru.

Hanson suspects that the reported case of Weil's disease, reported in Guayaquil, may be yellow fever. He believes that the International Health Board should investigate.