2011
DOI: 10.1097/inf.0b013e3182055cc2
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Effectiveness of the Monovalent G1P[8] Human Rotavirus Vaccine Against Hospitalization for Severe G2P[4] Rotavirus Gastroenteritis in Belém, Brazil

Abstract: Although fully heterotypic G2P[4] was the predominant RV strain, good VE was demonstrated. VE was highest in children aged 3 to 11 months. However, protection in children ≥ 12 months of age, important for optimal public health impact, was significantly sustained based on estimates obtained using neighborhood controls.

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Cited by 106 publications
(71 citation statements)
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References 33 publications
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“…5,6,37 The G1P [8]-derived vaccine is effective against genotypes heterotypic to the vaccine type, including the G2P [4] genotype that some have suggested is favored after vaccination. [40][41][42][43] Waning immunity to G2P [4] in the second year of life has been suggested as a means by which the genotype may persist at higher levels in vaccinated populations. 3 Despite any theoretical influence by vaccine, our data suggest that regional circulation patterns remain highly influential on detected genotypes.…”
Section: Discussionmentioning
confidence: 99%
“…5,6,37 The G1P [8]-derived vaccine is effective against genotypes heterotypic to the vaccine type, including the G2P [4] genotype that some have suggested is favored after vaccination. [40][41][42][43] Waning immunity to G2P [4] in the second year of life has been suggested as a means by which the genotype may persist at higher levels in vaccinated populations. 3 Despite any theoretical influence by vaccine, our data suggest that regional circulation patterns remain highly influential on detected genotypes.…”
Section: Discussionmentioning
confidence: 99%
“…A predominance in G2P(4) RVA strains was observed in Nicaragua and Brazil after the introduction of RV5 and RV1, respectively (Gurgel et al 2007, Patel et al 2009, Correia et al 2010, Justino et al 2011. Because this strain differs from the RV1 vaccine strain by G-type, P-type and genogroup and also from the RV5 vaccine strain which contains the G2 reassortant, but not the P(4) reassortant, monitoring of G2P (4) is of particular interest after the introduction of vaccine.…”
mentioning
confidence: 98%
“…In Nicaragua, the vaccine efficacy for averting RVA gastroenteritis hospitalization was 46% for the full schedule of RV5 and 52% for the partial vaccine schedule (Patel et al 2009). In the three middle income countries, the vaccine efficacy for averting RVA gastroenteritis hospitalization was 76-94% for the full schedule of RV1 (Gurgel et al 2007, Correia et al 2010, de Palma et al 2010, Justino et al 2011, Yen et al 2011b) and 51-84% for the partial vaccine schedule (de Palma et al 2010, Yen et al 2011b. In Nicaragua and Brazil, the most prevalent RVA genogroup identified among cases was G2P(4) (Gurgel et al 2007, Patel et al 2009, Correia et al 2010, Justino et al 2011, in El Salvador the most prevalent RVA genogroup identified among cases was G1P(8) (de Palma et al 2010) and in Mexico the most prevalent RVA genogroup identified among cases was G9P(4) (Yen et al 2011b).…”
mentioning
confidence: 99%
“…How well RV1 protects against G2P [4] in lower-income settings is still an important issue that requires further monitoring, given that some postintroduction evaluations suggest protection may be only modest in infancy or may not persist. [23][24][25] In our evaluation, we found no evidence of waning of protection from RV1…”
Section: Discussionmentioning
confidence: 48%