2018
Direct and possible indirect effects of vaccination on rotavirus hospitalisations among children in Malawi four years after programmatic introduction
Bennett A, Pollock L, Jere K, Pitzer V, Parashar U, Tate J, Heyderman R, Mwansambo C, French N, Nakagomi O, Iturriza-Gomara M, Everett D, Cunliffe N, Bar-Zeev N, Consortium F. Direct and possible indirect effects of vaccination on rotavirus hospitalisations among children in Malawi four years after programmatic introduction. Vaccine 2018, 36: 7142-7148. PMID: 29887320, PMCID: PMC6238204, DOI: 10.1016/j.vaccine.2018.04.030.Peer-Reviewed Original ResearchConceptsPost-vaccine introductionPrevalence of rotavirusVaccine effectivenessRotavirus prevalenceAcute gastroenteritisVaccine introductionRotavirus hospitalisationsVaccine coverageEfficacy estimatesAdjusted vaccine effectivenessRotavirus vaccine introductionYears of ageUse of vaccinesUnvaccinated infantsRotavirus diarrheaRotavirus diseaseUnvaccinated childrenReferral hospitalRoutine immunisationMalawian childrenSevere diarrheaStool samplesImportant causePoisson regressionHospitalisation
2014
Predicting the Impact of Vaccination on the Transmission Dynamics of Typhoid in South Asia: A Mathematical Modeling Study
Pitzer VE, Bowles CC, Baker S, Kang G, Balaji V, Farrar JJ, Grenfell BT. Predicting the Impact of Vaccination on the Transmission Dynamics of Typhoid in South Asia: A Mathematical Modeling Study. PLOS Neglected Tropical Diseases 2014, 8: e2642. PMID: 24416466, PMCID: PMC3886927, DOI: 10.1371/journal.pntd.0002642.Peer-Reviewed Original ResearchConceptsChristian Medical College HospitalSubstantial indirect protectionMedical College HospitalCulture-confirmed casesImpact of vaccinationIncidence of typhoidTransmission dynamicsOne-time campaignChronic carriersCollege HospitalVaccination strategiesEndemic settingsTyphoid feverVaccinationTyphoid infectionTyphoid casesNatural historyIndirect protectionVi polysaccharideBasic reproductive numberTyphoidIncidenceTyphoid incidenceAge distributionReproductive number
2012
Understanding Reduced Rotavirus Vaccine Efficacy in Low Socio-Economic Settings
Lopman BA, Pitzer VE, Sarkar R, Gladstone B, Patel M, Glasser J, Gambhir M, Atchison C, Grenfell BT, Edmunds WJ, Kang G, Parashar UD. Understanding Reduced Rotavirus Vaccine Efficacy in Low Socio-Economic Settings. PLOS ONE 2012, 7: e41720. PMID: 22879893, PMCID: PMC3412858, DOI: 10.1371/journal.pone.0041720.Peer-Reviewed Original ResearchConceptsLow socio-economic settingRotavirus vaccine efficacyVaccine efficacyRotavirus vaccineSevere diseaseNatural infectionImmunogenicity of vaccinationReduced vaccine efficacySevere rotavirus gastroenteritisReduced efficacyClinical trial resultsLow SES populationsRotavirus gastroenteritisVaccine performanceVaccination programImmune responseEpidemiological factorsVaccineVaccinationTrial resultsInfectionSES populationsEfficacyReduced protectionEfficacy declines
2009
Demographic Variability, Vaccination, and the Spatiotemporal Dynamics of Rotavirus Epidemics
Pitzer VE, Viboud C, Simonsen L, Steiner C, Panozzo CA, Alonso WJ, Miller MA, Glass RI, Glasser JW, Parashar UD, Grenfell BT. Demographic Variability, Vaccination, and the Spatiotemporal Dynamics of Rotavirus Epidemics. Science 2009, 325: 290-294. PMID: 19608910, PMCID: PMC3010406, DOI: 10.1126/science.1172330.Peer-Reviewed Original Research