Immune memory assessment three years following a single dose of hepatitis a vaccine at 12, 13 or 19 months of age
Bibliographic record
Abstract
INTRODUCTION: We aimed to evaluate immunological memory after three different single-dose hepatitis A vaccination schedules. METHODS: Children were vaccinated using one of three schedules: 1) Twinrix®Junior at 12 months (Twinrix12); 2) Vaqta®pediatric at 13 months (Vaqta13); or 3) Vaqta®pediatric at 19 months of age (Vaqta19), followed by a challenge dose with Twinrix®Junior three years later. Blood samples were collected before and one month post-challenge dose. RESULTS: A total of 320 children were included in this analysis. Seropositivity (≥20 mIU/mL) three years post-primary vaccination was lower for the Twinrix12 schedule (40.2 %) compared to the Vaqta13 (65.6 %) or Vaqta19 schedules (77.6 %). One month post-challenge dose, the proportion of participants with an anamnestic response was high and similar across the three schedules (Twinrix12: 97.5 %; Vaqta13: 98.4 %; Vaqta19: 96.1 %). CONCLUSION: Single-dose hepatitis A vaccination induced a strong immune response across the three schedules. However, further studies are needed to confirm long-term durability and population impact.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.002 | 0.002 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.002 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".