Regional Update, Influenza and Other Respiratory Viruses. Epidemiological Week 8 (1 March 2025)

Regional Situation: Over the past four Epidemiological Weeks (EWs), there has been a decline in lnfluenza-Like lllness (ILI) activity in the Americas region, stabi izing at medium eve s. Simi arly, a decrease has been observed in the activity of Severe Acute Respiratory lnfection (SARI), currently at low levels. In both cases, the observed activity has been associated with positive cases of influenza and SARS-CoV-2. ILI activity has been mainly linked to moderate activity observed in North America, which showed a mild increase in the past four weeks. Regarding the circulation of respiratory viruses, SARS-CoV-2 activity has remained moderate at the regional level compared to previous epidemic wave. Influenza activity has increased over the period; respiratory syncytial virus (RSV) activity, while remaining moderate, has also declined.