ArticleInternational journal of infectious diseases : IJID : official publication of the International Society for Infectious Diseases2021
Changing influenza activity in the Southern hemisphere countries during the COVID-19 pandemic.
Article in International journal of infectious diseases : IJID : official publication of the International Society for Infectious Diseases, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers, 1 of them a synthesis that pooled it.
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Who cites it
15 citing papers in PubMed, 1 synthesis or guideline pooled it, 39 citations in OpenAlex.
- Pooled it
- Analysis of spatial and temporal aggregation of influenza cases in Quzhou before and after COVID-19 pandemic.Annals of medicine · 2025Article
- Long-term retrospective analysis of seasonal influenza epidemic patterns in Southeastern Province of China: based on case reports, syndromic, and pathogenic surveillance.BMC infectious diseases · 2025Article
- Trends of respiratory viruses and factors associated with severe acute respiratory infection in patients presenting at a university hospital: a 6-year retrospective study across the COVID-19 pandemic.Frontiers in public health · 2025Article
- Changes in the Epidemiological Features of Influenza After the COVID-19 Pandemic in China, the United States, and Australia: Updated Surveillance Data for Influenza Activity.Interactive journal of medical research · 2024Article
- Influenza A, influenza B, and SARS-COV-2 circulation patterns in midwest Brazil during the 2022-2023 period.Brazilian journal of microbiology : [publication of the Brazilian Society for Microbiology] · 2024Article
- Prevalence of Endemic Respiratory Viruses During the COVID-19 Pandemic in Urban and Rural Malawi.Open forum infectious diseases · 2024Article
- Impact of non-pharmaceutical interventions during COVID-19 on future influenza trends in Mainland China.BMC infectious diseases · 2023Article
- Shifting Patterns of Influenza Circulation during the COVID-19 Pandemic, Senegal.Emerging infectious diseases · 2023Article
- Assessing the impact of COVID-19 interventions on influenza-like illness in Beijing and Hong Kong: an observational and modeling study.Infectious diseases of poverty · 2023Observational
- Epidemiological Patterns of Seasonal Respiratory Viruses during the COVID-19 Pandemic in Madagascar, March 2020-May 2022.Viruses · 2022Article
- Understanding the rebound of influenza in the post COVID-19 pandemic period holds important clues for epidemiology and control.International journal of infectious diseases : IJID : official publication of the International Society for Infectious Diseases · 2022Article
- Respiratory viruses in rural Zambia before and during the COVID-19 pandemic.Tropical medicine & international health : TM & IH · 2022Article
- From COVID-19 to Influenza-Real-Life Clinical Practice in a Pediatric Hospital.Diagnostics (Basel, Switzerland) · 2022Article
- Mitigating co-circulation of seasonal influenza and COVID-19 pandemic in the presence of vaccination: A mathematical modeling approach.Frontiers in public health · 2022Article
Corrections and comments
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Authors and funding
6 authors at 1 institution in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
introductionWhile the reduction in influenza cases in the Northern hemisphere in 2020 has been widely reported, the influenza transmission dynamics in the Southern hemisphere remain uncharacterized.
methodsThis study analysed the change in influenza-positive proportion (IPP) between 2010-2019 and 2020 in countries in the Southern hemisphere with ≤40% missing IPP data in FluNet to assess how coronavirus disease 2019 (COVID-19) relates to influenza activity. The analysis considered the incidence of COVID-19 reported by the World Health Organization and the implementation date of non-pharmaceutical interventions (NPIs) reported by the Oxford COVID-19 Government Response Tracker.
resultsIn each of the seven included countries, the average IPP was lower in 2020 than in 2010-2019 (P < 0.01), with the largest difference being 31.1% (95% confidence interval 28.4-33.7%). In Argentina, Bolivia, Chile and South Africa, higher IPPs were observed during epidemiological weeks 4-16 in 2020 compared with the same weeks in 2010-2019. The IPP increased after NPIs were implemented in Argentina and South Africa, but started to decline in Bolivia, Chile, Madagascar and Paraguay before NPI implementation.
conclusionsInfluenza burden and activity decreased in 2020 in the Southern hemisphere. The temporal decline in influenza activity varied between countries.
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