Influenza infection
Summary
Definition
History and exam
Key diagnostic factors
- winter season
- current influenza outbreak
- unvaccinated
- fever with cough
Other diagnostic factors
- sore throat
- cervical lymphadenopathy
- dyspnea
Risk factors
- age ≥65 years
- age 6-59 months
- chronic cardiovascular or respiratory conditions
- diabetes
- hemoglobinopathy
- immunocompromised status
- chronic kidney disease (CKD)
- pregnancy
- caregivers and household contacts of high-risk groups
- healthcare workers
Diagnostic tests
1st tests to order
- clinical diagnosis
Tests to avoid
- broad respiratory pathogen panels
- serology
Tests to consider
- molecular assays
- antigen detection tests
- viral culture
- chest x-ray
Treatment algorithm
exposure to infected individual(s) in at-risk population
adults
children
Contributors
Authors
Kyle Eggleton, MBChB PhD FRNZCGP(Dist)
Associate Dean Rural
Department of General Practice and Primary Health Care
University of Auckland
Auckland
New Zealand
Disclosures
KE declares that he has no competing interests.
Rachel Roskvist, MBChB, FRNZCGP, MHSc
Senior Lecturer
Department of General Practice and Primary Health Care
University of Auckland
Auckland
New Zealand
Disclosures
RR declares that she has no competing interests.
Bruce Arroll, MBChB PhD FRNZCGP
Department of General Practice and Primary Health Care
University of Auckland
Auckland
New Zealand
Раскрытие информации
BA declares that he has no competing interests.
Выражение благодарностей
Dr Kyle Eggleton, Dr Rachel Roskvist, and Professor Bruce Arroll would like to gratefully acknowledge Dr Cristine Radojicic, a previous contributor to this topic.
Раскрытие информации
CR declares that she is on Advisory boards for CSL Behring and Speakers Bureau Biocryst.
Рецензенты
Michael Ison, MD
Chief
Respiratory Diseases Branch
National Institute of Allergy and Infectious Diseases
Bethesda
MD
Раскрытие информации
MI declares that he has no competing interests.
Waleed Javaid, MD, FACP, FIDSA
Associate Professor
Medical Director of Infection Control
Infectious Disease
Department of Medicine
SUNY Upstate Medical University
Syracuse
NY
Раскрытие информации
WJ declares that he has no competing interests.
Rachel L. Miller, MD, FAAAAI
Associate Professor of Clinical Medicine and Environmental Health Sciences
Columbia University College of Physicians and Surgeons
New York
NY
Раскрытие информации
RLM declares that she has no competing interests.
Mark Sands, MD, FAAAAI
Chief
SUNY Buffalo School of Medicine
Division Allergy and Immunology
Buffalo
NY
Раскрытие информации
MS declares that he has no competing interests.
An De Sutter, MD, PhD
Associate Professor
Department of General Practice and Primary Health Care
Ghent University
Ghent
Belgium
Раскрытие информации
ADS declares that she has no competing interests.
Peer reviewer acknowledgements
BMJ Best Practice topics are updated on a rolling basis in line with developments in evidence and guidance. The peer reviewers listed here have reviewed the content at least once during the history of the topic.
Disclosures
Peer reviewer affiliations and disclosures pertain to the time of the review.
Список литературы
Основные статьи
Uyeki TM, Bernstein HH, Bradley JS, et al. Clinical practice guidelines by the Infectious Diseases Society of America: 2018 update on diagnosis, treatment, chemoprophylaxis, and institutional outbreak management of seasonal influenza. Clin Infect Dis. 2019 Mar 5;68(6):e1-47.Полный текст Аннотация
Centers for Disease Control and Prevention. Influenza (flu). Feb 2024 [internet publication].Полный текст
Centers for Disease Control and Prevention. Prevention and control of seasonal influenza with vaccines: recommendations of the Advisory Committee on Immunization Practices - United States, 2024-25 Influenza Season. Aug 2024 [internet publication].Полный текст Аннотация
Centers for Disease Control and Prevention. Child and adolescent immunization schedule by age (addendum updated July 2, 2025): recommendations for ages 18 years or younger, United States, 2025. Jul 2025 [internet publication].Полный текст
Centers for Disease Control and Prevention. Adult immunization schedule by age (addendum updated July 2, 2025): recommendations for ages 19 years or older, United States, 2025. Jul 2025 [internet publication].Полный текст
Centers for Disease Control and Prevention. Influenza antiviral medications: summary for clinicians. Dec 2023 [internet publication].Полный текст
Статьи, указанные как источники
A full list of sources referenced in this topic is available to users with access to all of BMJ Best Practice.
Отличия
- Coronavirus disease 2019 (COVID-19)
- Bacterial pneumonia
- Rhinovirus infection
Больше ОтличияРекомендации
- Statement on seasonal influenza vaccines for 2025-2026
- Child and adolescent immunization schedule by age: recommendations for ages 18 years of younger, United States, 2025
Больше РекомендацииЛифлеты для пациента
Flu
Antibiotics: what you need to know
Больше Лифлеты для пациента
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