Change in respiratory syncytial virus seasonality in Finland

Renko, Marjo; Tapiainen, Terhi

doi:10.1111/apa.14983

Cited by 9 publications

(14 citation statements)

References 5 publications

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“…In our study, both RSV and influenza hospitalizations exhibited season‐to‐season variation, which was more pronounced for influenza probably related to dominating influenza subtype and seasonal IVE. Attack rates of RSV hospitalizations were highest in 2017–2018 followed by 2019–20, which is consistent with the biannual larger RSV epidemics observed in Finland 15,16 . As many as 0.09% and 0.3% of 65‐ to 84‐year‐olds and 0.4% and 1.6% of 85+ adult population were hospitalized with acute RSV or influenza during the harshest season 2017–2018.…”

Section: Discussionsupporting

confidence: 79%

“…Attack rates of RSV hospitalizations were highest in 2017–2018 followed by 2019–20, which is consistent with the biannual larger RSV epidemics observed in Finland. 15 , 16 As many as 0.09% and 0.3% of 65‐ to 84‐year‐olds and 0.4% and 1.6% of 85+ adult population were hospitalized with acute RSV or influenza during the harshest season 2017–2018. We observed more than tenfold variations of influenza hospitalizations by season, which for 2019–2020 may partially be explained by the effect of the COVID‐19 pandemic on the circulation of influenza, but variation was considerable also between other seasons.…”

Section: Discussionmentioning

confidence: 99%

“…Both RSV and influenza epidemics occur between Weeks 41 and 20 in the northern hemisphere 13,14 . In Finland, RSV epidemics used to follow a pattern of a minor peak in April followed by a major peak in December every 2 years; however, since 2008, RSV epidemics occur every winter peaking between February and May but still exhibit a biennial pattern of major and minor epidemics 15,16 . Influenza epidemics vary considerably between seasons depending on the circulating virus type and preexisting immunity of the population.…”

Section: Introductionmentioning

confidence: 99%

“… 13 , 14 In Finland, RSV epidemics used to follow a pattern of a minor peak in April followed by a major peak in December every 2 years; however, since 2008, RSV epidemics occur every winter peaking between February and May but still exhibit a biennial pattern of major and minor epidemics. 15 , 16 Influenza epidemics vary considerably between seasons depending on the circulating virus type and preexisting immunity of the population. Previously, insensitive or slow diagnostic methods such as viral culture and serology were used to detect RSV in clinical studies, while tests suitable for clinical use were lacking.…”

Section: Introductionmentioning

confidence: 99%

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Clinical characteristics and population‐based attack rates of respiratory syncytial virus versus influenza hospitalizations among adults—An observational study

Auvinen

Syrjänen

Ollgren

et al. 2021

Influenza Resp Viruses

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Background The clinical significance of respiratory syncytial virus (RSV) among adults remains underinvestigated. We compared the characteristics and population‐based attack rates of RSV and influenza hospitalizations. Methods During 2018–2020, we recruited hospitalized adults with respiratory infection to our prospective substudy at a tertiary care hospital in Finland and compared the characteristics of RSV and influenza patients. In our retrospective substudy, we calculated the attack rates of all RSV and influenza hospitalizations among adults in the same geographic area during 2016–2020. Results Of the 537 prospective substudy patients, 31 (6%) had RSV, and 106 (20%) had influenza. Duration of hospitalization, need for intensive care or outcome did not differ significantly between RSV and influenza patients. RSV was more often missed or its diagnosis omitted from medical record (13% vs 1% p = 0.016 and 48% vs 15%, p > 0.001). In the retrospective substudy, the mean attack rates of RSV, influenza A, and influenza B hospitalizations rose with age from 4.1 (range by season 1.9–5.9), 15.4 (12.3–23.3), and 4.7 (0.5–16.2) per 100,000 persons among 18‐ to 64‐year‐olds to 58.3 (19.3–117.6), 204.1 (31.0–345.0), and 60.4 (0.0–231.0) per 100,000 persons among 65+‐year‐olds and varied considerably between seasons. Discussion While the attack rates of influenza hospitalizations were higher compared with RSV, RSV and influenza hospitalizations were similar in severity. Missing or underreporting of RSV infections may lead to underestimating its disease burden. Both RSV and influenza caused a substantial amount of hospitalizations among the elderly, stressing the need for more effective interventions.

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Section: Discussionsupporting

confidence: 79%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Clinical characteristics and population‐based attack rates of respiratory syncytial virus versus influenza hospitalizations among adults—An observational study

Auvinen

Syrjänen

Ollgren

et al. 2021

Influenza Resp Viruses

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“…Based on the Finnish registry data, the number of respiratory syncytial virus infections might be 2- to 3-fold greater in epidemic years. 9 The occurrence of influenza was not lower than average. Notably, this study was conducted before the coronavirus disease 2019 pandemic.…”

Section: Discussionmentioning

confidence: 87%

Etiology of Infectious Diseases in Acutely Ill Children at a Pediatric Hospital in Finland

Pöyry

Raappana

Kiviniemi

et al. 2021

Pediatric Infectious Disease Journal

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This is a brief report of the etiology of infectious diseases in a pediatric emergency department. Our cohort study of 4647 children demonstrated rhinovirus as the most common etiology in a pediatric emergency department (23%) and intensive care (48%). The population-based incidence of rhinovirus-related visits was 1796/100,000/yr in children <5 years. The most common bacterial pathogen was Escherichia coli (5%).

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No signs of “tripledemic” in Finnish children

Kuitunen

2023

Journal of Medical Virology

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Change in respiratory syncytial virus seasonality in Finland

Cited by 9 publications

References 5 publications

Clinical characteristics and population‐based attack rates of respiratory syncytial virus versus influenza hospitalizations among adults—An observational study

Clinical characteristics and population‐based attack rates of respiratory syncytial virus versus influenza hospitalizations among adults—An observational study

Etiology of Infectious Diseases in Acutely Ill Children at a Pediatric Hospital in Finland

No signs of “tripledemic” in Finnish children

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