Publications by authors named "L B Hejfets"
Assessment of effectivity of oral killed typhoid and paratyphoid B vaccines and aerosol chemical typhoid vaccine in controlled field trials.
J Hyg Epidemiol Microbiol Immunol
January 1977
A total of 3 controlled field trials were carried out. One of them (1963) showed that aerosol chemical typhoid vaccine did not protect vaccinated subjects from the disease. Two other tests (1964 and 1965) assessing the effectivity of killed orally administered typhoid vaccine revealed a short term (up to 3 months) protective effect expressed by an effectivity coefficient of 45%, fiducial limits being 8-70%.
View Article and Find Full Text PDFAssessment of effectivity of oral killed typhoid and paratyphoid b vaccines and aerosol chemical thyphoid vaccine in controlled field trials.
J Hyg Epidemiol Microbiol Immunol
March 1977
A total of 3 controlled field trials were carried out. One of them (1963) showed that aerosol chemical typhoid vaccine did not protect vaccinated subjects from the disease. Two other tests (1964 and 1965) assessing the effectivity of killed orally administered typhoid vaccine revealed a short term (up to 3 months) protective effect expressed by an effectivity coefficient of 45%, fiducial limits being 8-70%.
View Article and Find Full Text PDFDuration of postvaccination antityphoid immunity according to the results of strictly controlled field trials.
J Hyg Epidemiol Microbiol Immunol
October 1969