Monitoring COVID-19 and Influenza: The Added Value of a Severe Acute Respiratory Infection Surveillance System in Portugal

<div>Severe acute respiratory infection weekly proportion to all hospital admissions, North and Lisbon and Tagus Valley regions, 28 September 2021–22 May 2022 (number of SARI = 3,563; number of total hospital admissions = 32,011). SARI: severe acute respiratory infection.</div>

Canadian Journal of Infectious Diseases and Medical Microbiology

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Figure 2: Monitoring COVID-19 and Influenza: The Added Value of a Severe Acute Respiratory Infection Surveillance System in Portugal 