2024
5-year vaccine protection following a single dose of Vi-tetanus toxoid conjugate vaccine in Bangladeshi children (TyVOID): a cluster randomised trial
Qadri F, Khanam F, Zhang Y, Biswas P, Voysey M, Mujadidi Y, Kelly S, Bhuiyan A, Rajib N, Hossen I, Rahman N, Islam S, Pitzer V, Kim Y, Clemens J, Pollard A, Liu X. 5-year vaccine protection following a single dose of Vi-tetanus toxoid conjugate vaccine in Bangladeshi children (TyVOID): a cluster randomised trial. The Lancet 2024, 404: 1419-1429. PMID: 39396349, DOI: 10.1016/s0140-6736(24)01494-6.Peer-Reviewed Original ResearchConceptsTyphoid conjugate vaccineJapanese encephalitis vaccineVaccine effectivenessRandomised controlled trialsConjugate vaccineFollow-upTyphoid feverControlled trialsVaccine protectionChildren aged 9 monthsIncreased risk of typhoid feverAnti-Vi IgGRisk of typhoid feverVaccine efficacy dataTest-negative designAged 9 monthsUnvaccinated individualsHigh-burden countriesIncidence rate ratiosAnalyses of vaccine effectivenessSingle-doseSingle doseDecay of antibodiesSubgroup analysisBooster dose
2023
Floods and Diarrhea Risk in Young Children in Low- and Middle-Income Countries
Wang P, Asare E, Pitzer V, Dubrow R, Chen K. Floods and Diarrhea Risk in Young Children in Low- and Middle-Income Countries. JAMA Pediatrics 2023, 177: 1206-1214. PMID: 37782513, PMCID: PMC10546297, DOI: 10.1001/jamapediatrics.2023.3964.Peer-Reviewed Original ResearchMeSH KeywordsAdultChildChild, PreschoolCross-Sectional StudiesDeveloping CountriesDiarrheaFamily CharacteristicsFemaleFloodsHumansMaleConceptsMiddle-income countriesDiarrhea riskOdds ratioMAIN OUTCOMEMixed-effects logistic regression modelRisk of diarrheaCross-sectional studyHigher odds ratioPrevalence of diarrheaLogistic regression modelsHealth survey programUnexposed childrenEffect modificationChild healthDiarrhea prevalenceSurvey clustersSignificant associationHygiene practicesFourth weekWeeksStrong associationRandom interceptYoung childrenChildrenDiarrhea
2015
Environmental Drivers of the Spatiotemporal Dynamics of Respiratory Syncytial Virus in the United States
Pitzer VE, Viboud C, Alonso WJ, Wilcox T, Metcalf CJ, Steiner CA, Haynes AK, Grenfell BT. Environmental Drivers of the Spatiotemporal Dynamics of Respiratory Syncytial Virus in the United States. PLOS Pathogens 2015, 11: e1004591. PMID: 25569275, PMCID: PMC4287610, DOI: 10.1371/journal.ppat.1004591.Peer-Reviewed Original Research
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