OOIR: Observatory of International Research

Papers

(The H4-Index of Expert Review of Vaccines is 32. The table below lists those papers that are above that threshold based on CrossRef citation counts [max. 250 papers]. The publications cover those that have been published in the past four years, i.e., from 2021-08-01 to 2025-08-01.)

Article	Citations
Knowledge, attitudes, and perceptions towards pneumococcal vaccines among adults in the United States	194
Parental category B vaccine hesitancy and associated factors in China: an online cross-sectional survey	96
Expert review of global real-world data on COVID-19 vaccine booster effectiveness and safety during the omicron-dominant phase of the pandemic	93
Progress and challenges in Nipah vaccine development and licensure for epidemic preparedness and response	90
Relationship between attitudes toward the effectiveness of vaccine, concerns about adverse reactions, and proactively taking SARS-Cov-2 vaccine for family among medical workers in Taizhou, China	84
Effectiveness of an mRNA vaccine booster dose against SARS-CoV-2 infection and severe COVID-19 in persons aged ≥60 years and other high-risk groups during predominant circulation of the delta variant	77
Review of scientific evidence to support recommendations of the full-dose DTaP-IPV vaccination in pre-school age children in Italy	68
Monkeypox pandemic containment: does the ACAM2000 vaccine play a role in the current outbreaks?	64
Indirect protection from rotavirus vaccines: a systematic review	63
Evaluation strategies for measuring pneumococcal conjugate vaccine impact in low-resource settings	61
Economic evaluations of 13-valent pneumococcal conjugate vaccine: a systematic review	57
Waning intra-season vaccine effectiveness against influenza A(H3N2) underlines the need for more durable protection	55
A review of evidence for pneumococcal vaccination in adults at increased risk of pneumococcal disease: risk group definitions and optimization of vaccination coverage in the United Kingdom	52
Clinical development of variant-adapted BNT162b2 COVID-19 vaccines: the early Omicron era	50
Effectiveness of maternal vaccination with quadrivalent inactivated influenza vaccine in pregnant women and their infants in 2019-2020	49
The protective effects of two varicella vaccination strategies: A Bayesian modeling study in two megacities in South China	45
Lessons from a mature acellular pertussis vaccination program and strategies to overcome suboptimal vaccine effectiveness	44
Response to letter to the editor on a systematic review of invasive pneumococcal disease vaccine failures and breakthrough with higher-valency pneumococcal conjugate vaccines in children	41
Response to Feemster KA et al. letter to the editor on Cost-effectiveness analysis for PCV13 in adults 60 years and over with underlying medical conditions which put them at an elevated risk of pneumo	41
Comparative effectiveness of Omicron XBB 1.5-adapted COVID-19 vaccines: a systematic literature review and network meta-analysis	39
Personal and contextual determinants of COVID-19 vaccination intention: a vignette study	39
Microarray patches: scratching the surface of vaccine delivery	38
Research progress on substitution of in vivo method(s) by in vitro method(s) for human vaccine potency assays	37
The important lessons lurking in the history of meningococcal epidemiology	37
COVID-19 vaccination hesitancy in pregnant and breastfeeding women and strategies to increase vaccination compliance: a systematic review and meta-analysis	37

Anti-COVID-19 vaccines and rare cases of cerebral venous sinus thrombosis with thrombocytopenia: what about the pragmatic benefit/risk evaluation for still unvaccinated young women	35
Who is more likely to hesitate to accept COVID-19 vaccine: a cross-sectional survey in China	35
Vaccines against leishmaniasis: using controlled human infection models to accelerate development	34
Batch-to-batch consistency trial of an adenovirus type-5 vector-based COVID-19 vaccine in adults aged 18 years and above	34
Pre-erythrocytic malaria vaccines: RTS,S, R21, and beyond	33
Comparing reactogenicity of COVID-19 vaccines: a systematic review and meta-analysis	33
Immunogenicity and safety of a quadrivalent meningococcal tetanus toxoid-conjugate vaccine (MenACYW-TT): A review of the evidence and expert opinion	32
Parental COVID-19 vaccine hesitancy: a cross-sectional survey in Italy	32
Immunization in pregnancy to protect pregnant people and their newborns against COVID-19	32