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Measles humoral and cell-mediated immunity in children aged 5-10 years after primary measles immunization administered at 6 or 9 months of age.
- Source :
-
The Journal of infectious diseases [J Infect Dis] 2013 Feb 15; Vol. 207 (4), pp. 574-82. Date of Electronic Publication: 2013 Jan 08. - Publication Year :
- 2013
-
Abstract
- Background: Given the high infant measles mortality rate, there is interest in whether a measles immunization regimen beginning at <12 months of age provides lasting immunity.<br />Methods: Measles-specific immune responses were evaluated in 70 children aged 5-10 years after primary measles vaccine administered at 6, 9, or 12 months.<br />Results: At 5-10 years of age, the stimulation index for measles T-cell proliferation was 11.4 (SE, 1.3), 10.9 (SE, 1.5), and 14.4 (SE 2.1) when the first measles dose was given at 6, 9, or 12 months, respectively. Neutralizing antibody concentration (geometric mean titer [GMT]) in those immunized at 6 months of age was 125 mIU/mL (95% confidence interval [CI], 42-377) in the presence of passive antibodies (PAs) and 335 mIU/mL (95% CI, 211-531) in those without PAs; in those immunized at 9 months, GMTs were 186 mIU/mL (95% CI, 103-335) and 1080 mIU/mL (95% CI, 642-1827) in the presence and absence of PAs, respectively. The GMT was 707 mIU/mL (95% CI, 456-1095) when vaccine was administered at 12 months (P ≤ .04).<br />Conclusions: Measles-specific T-cell responses were sustained at 5-10 years of age regardless of age at time of primary measles immunization. Neutralizing antibody concentrations were lower in cohorts given the first vaccine dose at 6 months of age and in the presence of PAs; however, responses could be boosted by subsequent doses. Starting measles vaccination at <12 months of age may be beneficial during measles outbreaks or in endemic areas.
- Subjects :
- Antibodies, Neutralizing blood
Child
Child, Preschool
Female
Humans
Immunity, Cellular
Immunization Schedule
Lymphocyte Activation
Male
Measles prevention & control
Vaccination
Antibodies, Viral blood
Measles immunology
Measles Vaccine administration & dosage
Measles Vaccine immunology
Measles virus immunology
T-Lymphocytes immunology
Subjects
Details
- Language :
- English
- ISSN :
- 1537-6613
- Volume :
- 207
- Issue :
- 4
- Database :
- MEDLINE
- Journal :
- The Journal of infectious diseases
- Publication Type :
- Academic Journal
- Accession number :
- 23300162
- Full Text :
- https://doi.org/10.1093/infdis/jis719