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Open research questions in Pneumonia and Respiratory Infections

46 unresolved questions extracted from the limitations and future-work sections of 525 Pneumonia and Respiratory Infections papers in our library. Each links back to the study that raised it.

What the literature leaves open

  • However, the integrated laboratory characteristics and underlying host immune-inflammatory response patterns in children with MP + RSV coinfection remain unclear.

    Laboratory characteristics and immune-inflammatory profiles of Mycoplasma pneumoniae and respiratory syncytial virus coinfection in children: a retrospective study · 2026 · DOI

  • ConclusionOur findings provide preliminary evidence that low antibodies against three of four K-antigens, O1{beta},2{beta} and MrkA are inversely associated with iKPnD, and should be explored as potential vaccine antigens.

    Association of serum antibody to serotype-specific capsular (K), lipopolysaccharide (O) and MrkA with risk reduction of invasive Klebsiella pneumoniae disease in young infants: an observational study. · 2026 · DOI

  • Unfortunately, to date, there is still no standard definition of AP. Future multicenter, prospective studies with ARTICLE IN PRESS ARTICLE IN PRESS ACCEPTED MANUSCRIPT ARTICLE IN PRESS larger and more geographically diverse samples are warranted to validate the present findings and improve the external validity and generalizability of the results. Future studies are warranted to establish and validate a dedicated prognostic scoring system for aspiration pneumonia by incorporating eosinophil count with established clinical scores and routine laboratory parameters.

    Association of eosinophil levels with 30-day overall mortality in hospitalized patients with aspiration pneumonia · 2026 · DOI

  • LP pneumonia is exceedingly rare in children, with the existing literature consisting predominantly of isolated case reports or small case series, and a systematic characterization of its clinical features remains lacking.

    Clinical characteristics and outcomes of severe Legionella pneumophila pneumonia diagnosed by metagenomic next-generation sequencing in children: a case series of 8 patients · 2026 · DOI

  • Future studies may consider including a wider geographical sample and adopt a prospective design to increase the representativeness of the data and the generalization of the conclusions. Future studies with detailed pleural fluid analysis are warranted to explore whether empyema has distinct predictive factors and outcomes.

    Clinical characteristics, predictive factors, and therapeutic outcomes of mycoplasma pneumoniae pneumonia with pleural effusion in children: a retrospective cohort study · 2026 · DOI

  • Key among the challenges highlighted were the limited knowledge and skills of health workers, as well as the absence of much- needed logistics such as pulse oximeters at the primary health care facilities, which serve as a first point of call for young children with pneumonia within the community. In Uganda,[26] limited knowledge of symptoms of pneumonia, self-medication, proximity to the nearest health facility, and financial constraints were identified as factors associated with delayed presentation.

    Addressing the gaps in childhood pneumonia diagnosis and management in Ghana- Report on stakeholders’ perspectives · 2026 · DOI

  • Participants were purposively selected, which may restrict the generalizability of the findings. However, the diverse spectrum of stakeholder expertise and experience allows us to generalize the conclusions cautiously to the Ghanaian healthcare context. The composition of the stakeholder group limited the scope of data collection, and therefore, the study did not solicit the opinions of caregivers with children with a previous history of pneumonia. Information from key informants on pneumonia, we believe, could shed more light on the situation from the patient’s perspective. CONCLUSION Childhood pneumonia remains a major contributor to under-five mortality in Ghana, yet persistent barriers to its timely diagnosis and effective treatment hinder progress. Incorporating stakeholder perspectives and context-specific recommendations into national policy discourse is essential to improving outcomes.

    Addressing the gaps in childhood pneumonia diagnosis and management in Ghana- Report on stakeholders’ perspectives · 2026 · DOI

  • Sandra Kwarteng Owusu1 Martin Boamah7, Lawrence Ofori-Boadu8, Chris Fofie Opoku9, Samuel Frimpong Odoom10 Bamenla Quarm Goka12, Daniel Ansong1, Samuel Nkansah Darko2, Joyce Ashong3, Maame Yaa Nyarko4, Peter Kwarteng5, Dennis Laryea6,, Amponsah Achiano11, 1Department of Child Health, School of Medical Sciences, Kwame Nkrumah University of Science and Technology, 2Department of Molecular Medicine School of Medical Sciences, Kwame Nkrumah University of Science and Technology, 3Department of Paediatrics and Child Health, Komfo Anokye Teaching Hospital, Kumasi, 4Department of Paediatrics and Child Health, Princess Marie-Louise Children’s Hospital, 5United Nations International Children and Education Fund, 6Department of Disease Surveillance, Ghana Health Service, 7Ghana Country Office, World Health Organization, 8Division of Institutional Care, Ghana Health Service, 9Department of Reproductive and Child Health, Division of Family Health, Ghana Health Service, Accra, 10National Health Insurance Authority, Kumasi, 11Expanded Program on Immunization, Ghana Health Service, 12Department of Child Health, University of Ghana Medical School, Accra, Ghana.

    Addressing the gaps in childhood pneumonia diagnosis and management in Ghana- Report on stakeholders’ perspectives · 2026 · DOI

  • The in vivo transcriptional adaptations that Spn undergoes during nasopharyngeal colonization, particularly during influenza A virus (IAV) coinfection, are poorly understood.

    Influenza A Virus Coinfection Alters Streptococcus pneumoniae Gene Expression during Upper Respiratory Tract Colonization · 2026 · DOI

  • Pandemic-related disruptions and the 2022 Advisory Committee on Immunization Practices transition to simplified 15/20 valent Pneumococcal Conjugate Vaccine recommendations may have influenced uptake, but their impact has not been fully assessed.

    Trends and determinants of pneumococcal vaccine uptake among U.S. adults, 2019–2024: a pooled cross-sectional analysis · 2026 · DOI

  • Higher valent vaccines such as the 20 valent PCV (PCV20) may provide additional public health and economic benefits, yet their value in the contemporary UK setting has not been fully assessed using recent data.

    Projected health and economic impact of PCV20 vaccination in UK children: a dynamic transmission model · 2026 · DOI

  • However, the impact of switching from Synflorix or Prevenar 13 to Pneumosil remains to be seen but might be equivalent to Synflorix if serotypes 4 and 18C return and expand like other non-vaccine types.

    Serotype distribution of remaining invasive pneumococcal disease after extensive use of ten-valent and 13-valent pneumococcal conjugate vaccines (the PSERENADE project): a global surveillance analysis · 2024 · DOI

  • Extensive research has established that community acquired pneumonia has negative impact on clinical course on coronary heart disease (CHD), but the pathogenic mechanism was not understood.

    Interrelation between systemic inflammation markers, endothelial dysfunction and coronary heart disease clinical course after community-acquired pneumonia · 2015 · DOI

  • The current lack of evidence concerning its efficacy, effectiveness and the factors leading to successful implementation, coupled with CHWs' poor adherence, demand a thorough examination of the legitimacy of implementing CCMp in SSA countries.

    The community case management of pneumonia in Africa: a review of the evidence · 2013 · DOI

  • 1 Why has the control of pneumonia in young children been so neglected? Reasons that have been suggested include the nature of the target group (children in deprived communities), the multiple etiologies of pneumonia, lack of agreement among experts on the most appropriate intervention strategies and incorporation of case management of pneumonia into the Integrated Management of Childhood Illnesses (IMCI) strategy, which has reduced the disease’s visibility.

    A global action plan for the prevention and control of pneumonia · 2008 · DOI

  • Data are insufficient to recommend routine administration of PCV7 for children at moderate risk of pneumococcal invasive infection, including all children 24 to 35 months old, children 36 to 59 months old who attend out-of-home care, and children 36 to 59 months old who are of Native American (American Indian and Alaska Native) or African American descent.

    Policy Statement: Recommendations for the Prevention of Pneumococcal Infections, Including the Use of Pneumococcal Conjugate Vaccine (Prevnar), Pneumococcal Polysaccharide Vaccine, and Antibiotic Prophylaxis · 2000 · DOI

  • Severe pediatric pneumonia associated with thromboembolism is notable, yet its pathogenic mechanism remains elusive, suggesting a potential nonnegligible role of genetic susceptibility.

    <i>MTHFR</i> , Pneumonia, and Thrombosis in Children: A Gene-Infection Interaction · 2026 · DOI

  • While several pneumococcal bacteriocins have been characterized, the functions of many remain unknown, limiting our understanding of how these systems shape strain fitness and population dynamics.

    Rgg144/SHP144 - controlled Streptolancidin D mediates intra-species competition in Streptococcus pneumoniae with cumulative effect from other bacteriocins and fratricide · 2026 · DOI

  • BACKGROUND: Coal-dust, a persistent airborne pollutant, induces dose-related pulmonary fibrosis; however, plasma biomarkers for pre-clinical toxicity remain lacking.

    Noninvasive early detection and grading of pneumoconiosis via plasma proteomics and machine learning: PRSS3 as a potential biomarker · 2026 · DOI

  • However, several limitations of this study warrant consideration, most notably the potential for selection bias arising from the exclusion of patients with incomplete clinical records or unavailable tNGS reports.

    Comparison of targeted next-generation sequencing and conventional tests for pathogen detection in community-acquired and severe community-acquired pneumonia: a retrospective cohort study · 2026 · DOI

  • Although cases of organizing pneumonia have been reported in association with other antiCD20 agents such as rituximab, there is insufficient data in the literature on Ocrelizumab-associated lung involvement.

    Organizing pneumonia following ocrelizumab use in a patient with multiple sclerosis: A case report · 2023 · DOI

  • Bronchoscopy findings are mentioned as part of the diagnostic workup but detailed results and clinical significance are not documented in the excerpt.

    EVALUATION OF A CASE OF RECURRENT RESPIRATORY TRACT INFECTIONS. · 2017 · DOI

  • The study lacks discussion of preventive strategies or management protocols that could be applied to similar cases of recurrent respiratory tract infections.

    EVALUATION OF A CASE OF RECURRENT RESPIRATORY TRACT INFECTIONS. · 2017 · DOI

  • The paper presents a single case study of bronchiectasis without comparative analysis or broader patient cohorts to establish patterns in recurrent respiratory tract infections.

    EVALUATION OF A CASE OF RECURRENT RESPIRATORY TRACT INFECTIONS. · 2017 · DOI

  • An up-to-date evidence base on the effects of pneumococcal conjugate vaccines (PCVs) on infectious diseases and mortality in any population or setting regardless of age or health status is currently lacking.

    The Clinical Effectiveness of Pneumococcal Conjugate Vaccines: A Systematic Review and Meta-analysis of Randomized Controlled Trials · 2016 · DOI

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46 open questions have been extracted from the limitations and future-work passages of 525 Pneumonia and Respiratory Infections papers in our library. Each one below links back to the study that raised it, so you can read the original claim in context.

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