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Immunization of six-month-old infants with different doses of Edmonston-Zagreb and Schwarz measles vaccines.
N Engl J Med. 1990 Mar 01; 322(9):580-7.NEJM

Abstract

Because measles causes an estimated 2 million deaths per year among children in developing countries, including a substantial proportion of infants less than nine months old--the age at which vaccination is recommended--there has been interest in using different strains of vaccine and higher doses to achieve immunization of younger infants. We conducted a randomized trial of three different doses of Edmonston-Zagreb and of Schwarz measles vaccines in infants to evaluate the effect of the strain and dose of vaccine on the serologic response and acute adverse reactions to vaccination. Six-month-old infants received a standard, medium, or high dose of one of the vaccines, and nine-month-old infants received a standard dose. Antibody levels were measured before and after vaccination, by means of a plaque-reduction neutralization assay, in 1061 six-month-olds and 299 nine-month-olds. Edmonston-Zagreb vaccine produced higher rates of seroconversion and seropositivity than comparable doses of Schwarz vaccine. Among the six-month-old infants, the seroconversion rate 18 weeks after vaccination with the standard dose of Edmonston-Zagreb vaccine was 92 percent, that with the medium dose was 96 to 97 percent, and that with the high dose was 98 percent; the rates for the corresponding doses of Schwarz vaccine were 66 percent, 76 percent, and 91 percent, respectively. Higher seroconversion rates were observed with an increase in the dose of either Edmonston-Zagreb (P less than 0.01) or Schwarz (P less than 0.001) vaccine. The seroconversion rates produced by high and medium doses of Edmonston-Zagreb vaccine in six-month-olds were equal to or significantly higher than the rate produced by a standard dose of Schwarz vaccine in nine-month-olds (87 percent). Clinical adverse reactions were not associated with the strain or dose of a vaccine. We conclude that Edmonston-Zagreb vaccine is more immunogenic than Schwarz vaccine in infants and can induce effective immunization against measles at six months of age.

Authors+Show Affiliations

Division of Immunization, Centers for Disease Control, Atlanta, GA 30333.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Clinical Trial
Comparative Study
Journal Article
Randomized Controlled Trial
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.
Research Support, U.S. Gov't, P.H.S.

Language

eng

PubMed ID

2304505

Citation

Markowitz, L E., et al. "Immunization of Six-month-old Infants With Different Doses of Edmonston-Zagreb and Schwarz Measles Vaccines." The New England Journal of Medicine, vol. 322, no. 9, 1990, pp. 580-7.
Markowitz LE, Sepulveda J, Diaz-Ortega JL, et al. Immunization of six-month-old infants with different doses of Edmonston-Zagreb and Schwarz measles vaccines. N Engl J Med. 1990;322(9):580-7.
Markowitz, L. E., Sepulveda, J., Diaz-Ortega, J. L., Valdespino, J. L., Albrecht, P., Zell, E. R., Stewart, J., Zarate, M. L., & Bernier, R. H. (1990). Immunization of six-month-old infants with different doses of Edmonston-Zagreb and Schwarz measles vaccines. The New England Journal of Medicine, 322(9), 580-7.
Markowitz LE, et al. Immunization of Six-month-old Infants With Different Doses of Edmonston-Zagreb and Schwarz Measles Vaccines. N Engl J Med. 1990 Mar 1;322(9):580-7. PubMed PMID: 2304505.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Immunization of six-month-old infants with different doses of Edmonston-Zagreb and Schwarz measles vaccines. AU - Markowitz,L E, AU - Sepulveda,J, AU - Diaz-Ortega,J L, AU - Valdespino,J L, AU - Albrecht,P, AU - Zell,E R, AU - Stewart,J, AU - Zarate,M L, AU - Bernier,R H, PY - 1990/3/1/pubmed PY - 1990/3/1/medline PY - 1990/3/1/entrez SP - 580 EP - 7 JF - The New England journal of medicine JO - N Engl J Med VL - 322 IS - 9 N2 - Because measles causes an estimated 2 million deaths per year among children in developing countries, including a substantial proportion of infants less than nine months old--the age at which vaccination is recommended--there has been interest in using different strains of vaccine and higher doses to achieve immunization of younger infants. We conducted a randomized trial of three different doses of Edmonston-Zagreb and of Schwarz measles vaccines in infants to evaluate the effect of the strain and dose of vaccine on the serologic response and acute adverse reactions to vaccination. Six-month-old infants received a standard, medium, or high dose of one of the vaccines, and nine-month-old infants received a standard dose. Antibody levels were measured before and after vaccination, by means of a plaque-reduction neutralization assay, in 1061 six-month-olds and 299 nine-month-olds. Edmonston-Zagreb vaccine produced higher rates of seroconversion and seropositivity than comparable doses of Schwarz vaccine. Among the six-month-old infants, the seroconversion rate 18 weeks after vaccination with the standard dose of Edmonston-Zagreb vaccine was 92 percent, that with the medium dose was 96 to 97 percent, and that with the high dose was 98 percent; the rates for the corresponding doses of Schwarz vaccine were 66 percent, 76 percent, and 91 percent, respectively. Higher seroconversion rates were observed with an increase in the dose of either Edmonston-Zagreb (P less than 0.01) or Schwarz (P less than 0.001) vaccine. The seroconversion rates produced by high and medium doses of Edmonston-Zagreb vaccine in six-month-olds were equal to or significantly higher than the rate produced by a standard dose of Schwarz vaccine in nine-month-olds (87 percent). Clinical adverse reactions were not associated with the strain or dose of a vaccine. We conclude that Edmonston-Zagreb vaccine is more immunogenic than Schwarz vaccine in infants and can induce effective immunization against measles at six months of age. SN - 0028-4793 UR - https://www.unboundmedicine.com/medline/citation/2304505/Immunization_of_six_month_old_infants_with_different_doses_of_Edmonston_Zagreb_and_Schwarz_measles_vaccines_ L2 - https://www.nejm.org/doi/10.1056/NEJM199003013220903?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub=pubmed DB - PRIME DP - Unbound Medicine ER -