Yellow fever, a mosquito-borne viral hemorrhagic fever, is one of the most lethal diseases of humankind. The etiologic agent is the prototype member of the genus Flavivirus, family Flaviviridae, a group of small, enveloped, positive-sense, single-strand RNA viruses. Approximately one in seven people who become infected develop a rapidly progressive illness, with hepatitis, renal failure, hemorrhage and cardiovascular shock, with a case fatality rate of 20-50%. Yellow fever occurs in sub-Saharan Africa and tropical South America, where it remains a continuing public health problem of varying magnitude, depending on the level of vaccination coverage in the human population and cyclical, ecologic and climatic factors that influence virus transmission.

Yellow fever vaccine

Vaccinology, the concept of a science ranging from the study of immunology to the development and distribution of vaccines, was a word invented by Jonas Salk. This book covers the history of the methodological progress in vaccine development and to the social and ethical issues raised by vaccination. Chapters include "Jenner and the Vaccination against Smallpox," "Viral Vaccines," and "Ethical and Social Aspects of vaccines." Contributing authors include pioneers in the field, such as Samuel L. Katz and Hilary Koprowski. This history of vaccines is relatively short and many of its protagonists are still alive. This book was written by some of the chief actors in the drama whose subject matter is the conquest of epidemic disease.

History of vaccine development

Yellow Fever Vaccines

Mutual interference on the immune response to yellow fever vaccine and a combined vaccine against measles, mumps and rubella

The effects of concomitant administration of antimalarial drugs, oral polio vaccine, or yellow fever vaccine on the immune response elicited by the Vibrio cholerae CVD103-HgR and Salmonella typhi Ty21a live oral vaccines were investigated. Healthy adults were immunized with CVD103-HgR alone or combined with Ty21a. Subjects were randomized to simultaneously receive mefloquine, chloroquine or proguanil, or oral polio or yellow fever vaccine. The vibriocidal antibody seroconversion rate was significantly reduced (P = .008) only in the group that received chloroquine with the CVD103-HgR. The geometric mean vibriocidal antibody titer was significantly decreased in the groups that received chloroquine (P = .001) or mefloquine (P = .02) compared with titers in groups that received CVD103-HgR alone. However, similar immunosuppressive effects were not observed in the groups immunized with Ty21a and CVD103-HgR. Only the concomitant administration of proguanil effected a significant (P = .013) decline in the anti-S. typhi lipopolysaccharide antibody response. These results indicate that chloroquine and proguanil should not be simultaneously administered with the CVD103-HgR and Ty21a vaccine strains, respectively.

Safety and Immunogenicity of Live Oral Cholera and Typhoid Vaccines Administered Alone or in Combination with Antimalarial Drugs, Oral Polio Vaccine, or Yellow Fever Vaccine

Simultaneous vaccination against cholera and yellow fever

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Simultaneous vaccination against cholera and yellow fever