The incidence of acute respiratory infections due to Covid-19 continues to decline, with the incidence rate reaching 151.7 cases per 100,000 inhabitants last week, compared to 173.4 cases the week before, thus a decrease of 12.5%, according to data from the Surveillance System for Acute Respiratory Infections in Spain (SiVIRA).
Overall, the national rate of acute respiratory infections in primary care also fell to 359.4 cases per 100,000 inhabitants compared to 384.5 cases the previous week. Influenza rates are 8.1 cases per 100,000 inhabitants (8.5 cases per 100,000 inhabitants the previous week) and bronchiolitis 0.9 cases per 100,000 inhabitants, the same as the previous week.
The positivity rate for influenza is 1.8% (0.2% in the previous week), 42.2% for SARS-CoV-2 (45.1% in the previous week), and 0% for VRS. The influenza incidence rate is estimated at 6.5 cases per 100,000 population, a slight increase compared to 0.8 cases in the previous week.
The hospitalization rate for severe acute respiratory infections (SRI) is 10.7 cases per 100,000 inhabitants (13.2 cases/100,000 hours in the previous week). The positivity rate is 1% for influenza (0.4% in the previous week), 44% for SARS-CoV-2 (38.3% in the previous week), and 1.1% for RSV (0.5% in the previous week).
The hospitalization rate for COVID-19 is 4.7 cases per 100,000 inhabitants (5.1 cases/100,000 hours in the previous week). In terms of severity, since the start of the season, cases hospitalized for COVID-19 have 29.5% pneumonia, 4% ICU admissions and 7.5% fatality.
Finally, the hospitalization rate for RSV is estimated at 0.1 cases per 100,000 population, the same as the previous week. In terms of severity, since the beginning of the season, RSV hospitalizations have had a 20% incidence of pneumonia, a 10.3% incidence of ICU admission, and a 3.9% mortality rate.
95.7% of influenza viruses identified in primary care were type A (31.4% AH3N2 and 68.6% A(H1)pdm09 among subtypes) with 21.4% non-A subtype viruses. Of the 1602 influenza viruses identified in hospital cases, 1585 were type A viruses (29.2% AH3N2 and 70.8% A(H1)pdm09 among subtypes), with 46.6% non-A subtype viruses. The SARS-CoV-2 variant identified with the highest proportion in IRAS cases in primary care is BA.2.86 (59.62%), with a predominance of 81.49% since the start of the season corresponding to the prevalence of lineages and sublineages JN.1.
The SARS-CoV-2 variant identified with the highest prevalence in hospitalized ARIG cases is BA.2.86 (60.47%), with a predominance of 80.98% since the start of the season corresponding to the prevalence of lineages and sublineages JN.1.
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