ArticleCell2020
A Single-Dose Intranasal ChAd Vaccine Protects Upper and Lower Respiratory Tracts against SARS-CoV-2.
Article in Cell, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT04751682 (A Phase 1, Randomized, Double-blinded, Multicenter Study to Evaluate the Reactogenicity, Safety, and Immunogenicity of an Intranasal Adenovirus Vector COVID-19 Vaccine), which is not on this map. Cited by 411 papers, 1 of them a synthesis that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
A Phase 1, Randomized, Double-blinded, Multicenter Study to Evaluate the Reactogenicity, Safety, and Immunogenicity of an Intranasal Adenovirus Vector COVID-19 Vaccine (BBV154) in Healthy Volunteers
Who cites it
411 citing papers in PubMed, 1 synthesis or guideline pooled it, 620 citations in OpenAlex.
- Mucosal immunity and vaccine development.Signal transduction and targeted therapy · 2026Pooled it
- Mucosal immunization with an adenoviral vector expressing a prefusogenic F protein protects the upper and lower respiratory tracts of cotton rats against live respiratory syncytial virus challenge.Human vaccines & immunotherapeutics · 2026Article
- Review
- Spatiotemporal heterologous vaccination relies on type I interferons at priming to enhance mucosal immunity.EMBO molecular medicine · 2026Article
- Human lungs maintain tissue-resident memory T cells against a broad spectrum of pathogens.Nature immunology · 2026Article
- The Role of Human Viral Entry Receptor Mouse Models in Advancing Antiviral Antibodies and Vaccines.Vaccines · 2026Review
- Harnessing mucosal immunity for protective vaccines.Nature reviews. Immunology · 2026Review
- Broad and durable protection against SARS-CoV-2 and SARS-CoV by an intranasal chimpanzee adenovirus vaccine expressing tandem RBDs and nucleocapsid.PLoS pathogens · 2026Article
- CD8MedComm · 2026Review
- A Multiepitope Intranasal Adenoviral Vaccine Induces Robust Mucosal Immunity and Protection against SARS‑CoV‑2.Journal of nanobiotechnology · 2026Article
- Intranasal boosting induces variant-specific responses in SARS-CoV-2 vaccine-imprinted mice.Nature communications · 2026Article
- A subunit vaccine for multiple respiratory viruses.Science advances · 2026Article
- B cell αv integrin regulates tissue specialization and clonal expansion of lung germinal center and memory B cells after viral infection.Science advances · 2026Article
- Article
- Intranasal vaccine combining adenovirus and trimeric subunit protein provides superior immunity against SARS-CoV-2 Omicron variant.Nature biomedical engineering · 2026Article
- Effects of cellular receptors on the vaccine efficacies of adenovirus vector-based vaccines following intramuscular and intranasal administration.Scientific reports · 2026Article
- Intranasal replicating adenovirus type 4-vectored SARS-CoV-2 vaccines induce durable and efficacious responses in preclinical testing.iScience · 2026Article
- Accumulation of mutations in nsp4, E, and the S2 subunit underlies mammalian cell tropism expansion and virulence attenuation of avian coronavirus.PLoS pathogens · 2026Article
- Construction of the Multi-Epitope HFMD Vaccine Based on an Attenuated CVB3 Vector and Evaluation of Immunological Responses in Mice.Vaccines · 2026Article
- Combination of adenovirus vector and subunit protein elicits a robust immune response against the SARS-CoV-2 Omicron variant.Molecular biomedicine · 2026Article
351 more citing papers are in PubMed but not listed here.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
31 authors at 3 institutions in 1 country.
Funding
Abstract
The coronavirus disease 2019 pandemic has made deployment of an effective vaccine a global health priority. We evaluated the protective activity of a chimpanzee adenovirus-vectored vaccine encoding a prefusion stabilized spike protein (ChAd-SARS-CoV-2-S) in challenge studies with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) and mice expressing the human angiotensin-converting enzyme 2 receptor. Intramuscular dosing of ChAd-SARS-CoV-2-S induces robust systemic humoral and cell-mediated immune responses and protects against lung infection, inflammation, and pathology but does not confer sterilizing immunity, as evidenced by detection of viral RNA and induction of anti-nucleoprotein antibodies after SARS-CoV-2 challenge. In contrast, a single intranasal dose of ChAd-SARS-CoV-2-S induces high levels of neutralizing antibodies, promotes systemic and mucosal immunoglobulin A (IgA) and T cell responses, and almost entirely prevents SARS-CoV-2 infection in both the upper and lower respiratory tracts. Intranasal administration of ChAd-SARS-CoV-2-S is a candidate for preventing SARS-CoV-2 infection and transmission and curtailing pandemic spread.
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What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.