ArticleFrontiers in public health2023
Pan-India influenza-like illness (ILI) and Severe acute respiratory infection (SARI) surveillance: epidemiological, clinical and genomic analysis.
Article in Frontiers in public health, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers.
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24 citing papers in PubMed, 27 citations in OpenAlex.
- Reactogenicity, safety, and immunogenicity of a quadrivalent seasonal influenza vaccine in adults aged 65 years and older: Phase 4 study results from India during December 2023-February 2024.Human vaccines & immunotherapeutics · 2025Trial
- Trends of severe human metapneumovirus infections in India.BMC infectious diseases · 2026Article
- Large population-based assessment of SARS-CoV-2 teratogenicity by profiling congenital anomalies during COVID-19 pandemic.Journal of the Turkish German Gynecological Association · 2026Article
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- Burden and risk factors of influenza-associated acute respiratory infections among older adults in India: a multicentric community-based surveillance (2018-2023).The Lancet regional health. Southeast Asia · 2026Article
- Epidemiological analysis of respiratory pathogen detection in 11 regions of Yunnan from 2021 to 2023.Frontiers in public health · 2026Article
- Review
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- Optimizing Influenza Vaccine Protection in India.Indian pediatrics · 2025Review
- Epidemiology and surveillance of influenza, RSV and SARS-CoV-2 in children admitted with severe acute respiratory infection in West bengal, India from 2022 to 2023.BMC infectious diseases · 2025Article
- Review
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- Identification & genetic & virological characterisation of a human case of avian influenza A (H9N2) virus from Eastern India.The Indian journal of medical research · 2025Article
- Seasonal influenza surveillance and vaccination policies in the WHO South-East Asian Region.BMJ global health · 2025Review
- Enhancing epidemic preparedness: a data-driven system for managing respiratory infections.BMC infectious diseases · 2025Article
- Respiratory virus infection dynamics and genomic surveillance to detect seasonal influenza subtypes in wastewater: A longitudinal study in Bengaluru, India.PLOS global public health · 2025Article
- Molecular epidemiology of influenza, respiratory syncytial virus, SARS-CoV-2, other respiratory viruses and bacteria among children 0-2-year-olds in West Bengal: a one-year influenza-like illness surveillance study (2022-2023).Frontiers in epidemiology · 2025Article
- Article
- IAPSM's Position Paper on Influenza Vaccines for Adult Immunization in India.Indian journal of community medicine : official publication of Indian Association of Preventive & Social Medicine · 2024Article
- Respiratory viruses associated with severe acute respiratory infection in children aged <5 years at a tertiary care hospital in Delhi, India during 2013-15.Journal of global health · 2024Article
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44 authors at 20 institutions in 1 country.
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Abstract
Background: Over time, COVID-19 testing has significantly declined across the world. However, it is critical to monitor the virus through surveillance. In late 2020, WHO released interim guidance advising the use of the existing Global Influenza Surveillance and Response System (GISRS) for the integrated surveillance of influenza and SARS-CoV-2. Methods: In July 2021, we initiated a pan-India integrated surveillance for influenza and SARS-CoV-2 through the geographically representative network of Virus Research and Diagnostic Laboratories (VRDLs) across 26 hospital and laboratory sites and 70 community sites. A total of 34,260 cases of influenza-like illness (ILI) and Severe acute respiratory infection (SARI) were enrolled from 4 July 2021 to 31 October 2022. Findings: Influenza A(H3) and B/Victoria dominated during 2021 monsoon season while A(H1N1)pdm09 dominated during 2022 monsoon season. The SARS-CoV-2 "variants of concern" (VoC) Delta and Omicron predominated in 2021 and 2022, respectively. Increased proportion of SARI was seen in extremes of age: 90% cases in < 1 year; 68% in 1 to 5 years and 61% in ≥ 8 years age group. Approximately 40.7% of enrolled cases only partially fulfilled WHO ILI and SARI case definitions. Influenza- and SARS-CoV-2-infected comorbid patients had higher risks of hospitalization, ICU admission, and oxygen requirement. Interpretation: The results depicted the varying strains and transmission dynamics of influenza and SARS-CoV-2 viruses over time, thus emphasizing the need to continue and expand surveillance across countries for improved decision making. The study also describes important information related to clinical outcomes of ILI and SARI patients and highlights the need to review existing WHO ILI and SARI case definitions.
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