Shifts in Respiratory Virus Epidemiology on Reunion Island From 2017 to 2023: Impact of COVID‐19 Pandemic and Non‐Pharmaceutical Interventions

Influenza and Other Respiratory Viruses, Journal Year: 2025, Volume and Issue: 19(3)

Published: March 1, 2025

ABSTRACT Background The COVID‐19 pandemic has reshaped the landscape of respiratory viral infections globally. This study examines these changes on Reunion Island, a French department in southeastern Indian Ocean. Methods Retrospective data from 2017 to 2023, over 24,000 samples collected across hospital system, partner laboratories, and network sentinel physicians, were analyzed correlated with number consultations at emergency physicians for symptoms acute (ARIs). epidemiology viruses was by comparing pre‐ post‐COVID‐19 periods assess disruptions seasonal patterns, virus prevalence, affected age groups. Results Our database effectively captured island, as demonstrated its strong correlation ARI. Post‐COVID‐19, influenza exhibited multiple epidemic waves within single year, deviating traditional annual peak showing significant decline circulation 2020 2023. syncytial also impacted post‐COVID‐19, epidemics starting earlier lasting longer compared pre‐COVID‐19 years. Human rhinovirus circulated more prominently post‐COVID period, accounting up one‐third positive cases, becoming most prevalent (excluding SARS‐CoV‐2). Conclusions These findings suggest notable impact associated NPIs Island since mid‐2020. They underscore complex interplay between interference, public health interventions, behavioral changes, youth immunity, emphasizing need adaptable strategies managing outbreaks era.

Language: Английский

Insights into Genetic and Antigenic Characteristics of Influenza A(H1N1)pdm09 Viruses Circulating in Sicily During the Surveillance Season 2023–2024: The Potential Effect on the Seasonal Vaccine Effectiveness

Viruses, Journal Year: 2024, Volume and Issue: 16(10), P. 1644 - 1644

Published: Oct. 21, 2024

After disruption in the influenza circulation due to emergence of SARS-CoV-2, intensity seasonal outbreaks has returned pre-pandemic levels. This study aimed evaluate evolution and variability whole-genome sequences A(H1N1)pdm09, predominant virus Sicily (Italy) during season 2023-2024. The potential vaccine efficacy was calculated using

Language: Английский

Impact of the COVID-19 Pandemic on Influenza Hospital Admissions and Deaths in Wales: Descriptive National Time Series Analysis

JMIR Public Health and Surveillance, Journal Year: 2024, Volume and Issue: 10, P. e43173 - e43173

Published: Aug. 21, 2024

Abstract Background The COVID-19 pandemic and the ensuing implementation of control measures caused widespread societal disruption. These disruptions may also have affected community transmission seasonal circulation patterns endemic respiratory viruses. Objective We aimed to investigate impact COVID-19–related disruption on influenza-related emergency hospital admissions deaths in Wales first 2 years pandemic. Methods A descriptive analysis influenza activity was conducted using anonymized pathology, hospitalization, mortality data from Secure Anonymised Information Linkage Databank Wales. annual incidence hospitalizations with influenza-specific diagnosis codes between January 1, 2015, December 31, 2021, estimated. Case definitions hospitalization death required laboratory confirmation a polymerase chain reaction test. Trends were analyzed monthly yearly. sensitivity analyses by extending case include acute illnesses positive test limiting those as primary diagnosis. examined yearly testing trends understand changes behavior during Results studied population 3,235,883 Welsh residents 2020 median age 42.5 (IQR 22.9–61.0) years. Influenza increased notably last months 2020, particularly 2021 39,720 per 100,000 people, compared prepandemic levels (1343 2019). percentage matched an 74.8% (1890/2526) 2019 85.2% (98/115) 2021. However, decreased 17.0 2.7 0.6 respectively. Similarly, due 0.4 0.0 Sensitivity showed similar decreasing Conclusions Nonpharmaceutical interventions associated substantial reduction virus, reductions cases observed. Beyond context, consideration should be given role nonpharmaceutical community-driven reduce burden influenza.

Language: Английский