Observational studyHuman vaccines & immunotherapeutics2022
Extended surveillance to assess safety of 9-valent human papillomavirus vaccine.
Observational study in Human vaccines & immunotherapeutics, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers, 2 of them syntheses 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.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
10 citing papers in PubMed, 2 syntheses or guidelines pooled it, 9 citations in OpenAlex.
- Serious adverse events following human papillomavirus vaccination: A systematic review and meta-analysis of post-marketing evidence.Human vaccines & immunotherapeutics · 2026Pooled it
- Effects of human papillomavirus (HPV) vaccination programmes on community rates of HPV-related disease and harms from vaccination.The Cochrane database of systematic reviews · 2025Pooled it
- Post-licensure safety surveillance of 9-valent human papillomavirus vaccine using the vaccine adverse event reporting system, 2014-2024.Frontiers in public health · 2026Article
- Human papillomavirus infection and atherosclerotic cardiovascular disease: a comprehensive review of epidemiological evidence, molecular mechanisms, and vaccination-mediated protection.Frontiers in genetics · 2026Review
- Real-world safety of HPV vaccines over 18 y: A comprehensive analysis of U.S. VAERS reports.Human vaccines & immunotherapeutics · 2025Article
- Real-Time Pharmacovigilance: Transforming Population-Based Monitoring of Post-Approval Vaccine Safety Through Rapid Cycle Analysis (RCA)-A Review of the Published Literature.Pharmaceuticals (Basel, Switzerland) · 2025Review
- Cellular and humoral vaccination response under immunotherapies-German consensus on vaccination strategies in neurological autoimmune diseases.Therapeutic advances in neurological disorders · 2025Article
- Advances and challenges in cancer immunoprevention and immune interception.Journal for immunotherapy of cancer · 2024Review
- Are We Losing the Final Fight against Cancer?Cancers · 2024Article
- Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
12 authors at 5 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The safety of 9-valent HPV vaccine (9vHPV) has been established with regard to common and uncommon adverse events. However, investigation of rare and severe adverse events requires extended study periods to capture rare outcomes. This observational cohort study investigated the occurrence of three rare and serious adverse events following 9-valent human papillomavirus (9vHPV) vaccination compared to other vaccinations, in US individuals 9-26 years old, using electronic health record data from the Vaccine Safety Datalink (VSD). We searched for occurrences of Guillain-Barré syndrome (GBS), chronic inflammatory demyelinating polyneuropathy (CIDP), and stroke following 9vHPV vaccination from October 4, 2015, through January 2, 2021. We compared the risks of GBS, CIDP, and stroke following 9vHPV vaccination to risks of those outcomes following comparator vaccines commonly given to this age group (Td, Tdap, MenACWY, hepatitis A, and varicella vaccines) from January 1, 2007, through January 2, 2021. We observed 1.2 cases of stroke, 0.3 cases of GBS, and 0.1 cases of CIDP per 100,000 doses of 9vHPV vaccine. After observing more than 1.8 million doses of 9vHPV, we identified no statistically significant increase in risks associated with 9vHPV vaccination for any of these adverse events, either combined or stratified by age (9-17 years of age vs. 18-26 years of age) and sex (males vs. females). Our findings provide additional evidence supporting 9vHPV vaccine safety, over longer time frames and for more serious and rare adverse events.
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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.