Andorra Sees Slight Rise in Respiratory Infections, Flu Declines in Early 2026

respiratory infections (ARI) in Andorra increased slightly during the first week of 2026, from December 29 to January 4, with a rate of 307.87 cases per 100,000 inhabitants. This represents a rise from 279.7 cases per 100,000 the previous week, primarily impacting children aged 0 to 4.

Influenza rates continued to decline, falling to 101.04 cases per 100,000 from 133.2 the week prior. The hardest-hit groups were infants aged 0 to 1 and adults over 74.

Testing for circulating respiratory viruses showed 9.91% of samples positive, down from 15.8% the previous week. Among positives, influenza A accounted for 82.61%, adenovirus 8.7%, and both rhinovirus/enterovirus and respiratory syncytial virus (RSV) 4.35% each.

These figures follow lower incidence of flu and other respiratory illnesses at the close of 2025. Across Europe, ARI rates exceed baseline levels in about half of countries, signaling notable virus circulation. Flu incidence is rising at low-to-moderate intensity, dominated by influenza A and mainly affecting children aged 5 to 14. SARS-CoV-2 cases are decreasing across age groups, while RSV infections remain low but are gradually increasing.

Health authorities are tracking these patterns as the year progresses.