ArticleFrontiers in immunology2022
COVID-19 Recovery Patterns Across Alpha (B.1.1.7) and Delta (B.1.617.2) Variants of SARS-CoV-2.
Article in Frontiers in immunology, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.
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Who cites it
12 citing papers in PubMed.
- Genomic surveillance of SARS-CoV-2 variants in hospitalized patients: a cohort study from the metropolitan area of valle de Aburrá, ColombiaBiomedica : revista del Instituto Nacional de Salud · 2026Article
- A tri-light warning system for hospitalized COVID-19 patients: Credibility-based risk stratification for future pandemic preparedness.European journal of radiology open · 2024Article
- Early pulmonary fibrosis-like changes between delta and pre-delta periods in patients with severe COVID-19 pneumonia on mechanical ventilation.Scientific reports · 2024Article
- Mortality Impact of Severe COVID-19 in the ICU: A Study from the Târgu Mureș Support Unit.Life (Basel, Switzerland) · 2024Article
- Applications of Mass Spectrometry in the Characterization, Screening, Diagnosis, and Prognosis of COVID-19.Advances in experimental medicine and biology · 2024Article
- Security or severity? A research of COVID-19 pandemic control policy based on nonlinear programming approach.Heliyon · 2023Article
- Cross protection to SARS-CoV-2 variants in hamsters with naturally-acquired immunity.Virology journal · 2023Article
- Clinical Outcome of Coronavirus Disease 2019 in Patients with Primary Antibody Deficiencies.Pathogens (Basel, Switzerland) · 2023Review
- Unsupervised machine learning framework for discriminating major variants of concern during COVID-19.PloS one · 2023Article
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- A loop-mediated isothermal amplification-enabled analytical assay for the detection of SARS-CoV-2: A review.Frontiers in cellular and infection microbiology · 2022Review
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4 authors.
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Abstract
Background: B.1.1.7 (alpha) and B.1.617.2 (delta) variants of concern for SARS-CoV-2 have been reported to have differential infectivity and pathogenicity. Difference in recovery patterns across these variants and the interaction with vaccination status has not been reported in population-based studies. Objective: The objective of this research was to study the length of stay and temporal trends in RT-PCR cycle times (Ct) across alpha and delta variants of SARS-CoV-2 between vaccinated and unvaccinated individuals. Methods: Participants consisted of patients admitted to national COVID-19 treatment facilities if they had a positive RT-PCR test for SARS-CoV-2, and analysis of variants was performed (using whole genome sequencing). Information on vaccination status, age, sex, cycle times (Ct) for four consecutive RT-PCR tests conducted during hospital stay, and total length of hospital stay for each participant were ascertained from electronic medical records. Results: Patients infected with the delta variant were younger (mean age = 35years vs 39 years for alpha, p<0.001) and had lesser vaccination coverage (54% vs 72% for alpha, p<0.001). RT-PCR Ct values were similar for both variants at the baseline test; however by the fourth test, delta variant patients had significantly lower Ct values (27 vs 29, p=0.05). Length of hospital stay was higher in delta variant patients in vaccinated (3 days vs 2.9 days for alpha variant) as well as in unvaccinated patients (5.2 days vs 4.4 days for alpha variant, p<0.001). Hazards of hospital discharge after adjusting for vaccination status, age, and sex was higher for alpha variant infections (HR=1.2, 95% CI: 1.01-1.41, p=0.029). Conclusion: Patients infected with the delta variant of SARS-CoV-2 were found to have a slower recovery as indicated by longer length of stay and higher shedding of the virus compared to alpha variant infections, and this trend was consistent in both vaccinated and unvaccinated patients.
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