References
- Scheibel I, Bentzon M W, Christenson P E, Biering A. Duration of immunity to diphtheria and tetanus after active immunization. Acta Pathol Microbiol Scand 1966; 67: 380–392
- Kjeldsen K, Simonsen O, Heron I. Immunity against diphtheria 25–30 years after primary vaccination in childhood. Lancet 1985; 1: 900–902
- Christenson B, Böttiger M. Serological immunity to diphtheria in Sweden in 1978 and 1984. Scand J Infect Dis 1986; 18: 227–233
- Holmgren B, Böttiger M, Lindberg A, Lindqvist L, Romanus V, Ullberg-Olsson K. Diphtheria—still a prevalent disease. Läkartidningen 1978; 75: 676–680, (In Swedish.)
- Miyamura K, Nishio S, Ito A, Murata R, Kono R. Micro cell culture method for determination of diphtheria toxin and antitoxin titres using VERO cells. I. Studies on factors affecting the toxin and antitoxin titration. J Biol Stand 1974; 2: 189–203
- Miyamura K, Tajiri E, Ito A, Murata R, Kono R. Micro cell culture method for determination of diphtheria toxin and antitoxin titres using VERO cells. II. Comparison with the rabbit skin method and practical application for seroepidemiological studies. J Biol Stand 1974; 2: 203–209
- Ipsen J. Circulating antitoxin at the onset of diphtheria in 425 patients. J Immunol 1946; 54: 325–347
- Edsall G, Banton H J, Wheeler R E. The antigenicity of single graded doses of purified diphtheria toxoid in man. Am J Hyg 1951; 53: 283–293
- Yokoi K. Contributions to the study on antitoxin contents of blood sera of diphtheric patients and of diphtheric bacilli carriers. Jpn J Exp Med 1932; 10: 291–301
- Edward D G, Allison V D. Diphtheria in the immunized with observation on a diphtheria-like disease associated with non-toxigenic strains of Corynebacterium diphtheriae. J Hyg 1951; 49: 205–219
- Mathias R G, Schechter M T. Booster immunization for diphtheria and tetanus: No evidence of need in adults. Lancet 1985; 1: 1089–1091
- Naiditch M J, Bower A G. Diphtheria: A study of 1433 cases observed during a ten-year period at the Los Angeles County Hospital. Am J Med 1954; 17: 229–245
- Palmer S R, Balfour A H, Jephcott A E. Immunization of adults during an outbreak of diphtheria. Br Med 1983; 1286: 624–626