COVID-19 and Respiratory Infections in Spain: What the Data Says About Babies, Seniors, and Vaccines
- Infections respiratorias agudas in Spain crossed the epidemic threshold during the week of September 21 to 27, 2026, driven primarily by SARS-CoV-2 rather than influenza, according to data...
- Subsequent reporting from El País highlighted a modest stabilization in overall respiratory infection metrics into early October, revealing a nuanced divergence among circulating pathogens.
- Hospital surveillance figures captured a parallel uptick in severe acute respiratory infections, alongside an unexpected bump in general mortality metrics.
Infections respiratorias agudas in Spain crossed the epidemic threshold during the week of September 21 to 27, 2026, driven primarily by SARS-CoV-2 rather than influenza, according to data from the Instituto de Salud Carlos III (ISCIII). While Diario Sanitario reported that the transmission rate remained at a low intensity compared with previous seasons, primary care samples showed that more than one in four tested positive for COVID-19, contrasted against a mere 4% positivity rate for the flu. The national epidemiological surveillance recorded an estimated incidence of roughly 120 cases per 100,000 inhabitants alongside a hospital admission rate of 1.7 per 100,000 during that initial tracking window.
Diverging Trends Across Respiratory Pathogens
Subsequent reporting from El País highlighted a modest stabilization in overall respiratory infection metrics into early October, revealing a nuanced divergence among circulating pathogens. While the Sistema de Vigilancia de Infección Respiratoria Aguda (SiVIRA) placed the broad infection rate at 493.8 cases per 100,000 inhabitants for the week ending October 4, 2026, that upward trajectory stemmed primarily from pediatric bronchitis cases rather than soaring coronavirus transmission. El País noted that COVID-19 incidence effectively flattened at 118.4 cases per 100,000, while Redacción médica specified a slight downward shift of 0.8 points from the previous week’s figures. Meanwhile, influenza and the respiratory syncytial virus remained subdued, with influenza positivity dipping from 4.1% to 3.5% according to El País, and the absolute detection of VRS remaining close to zero in primary care sentinel samples. The current rate of acute respiratory infections stands as the second lowest across the five seasons reflected in the series, exceeding only the 466.8 cases per 100,000 recorded at the start of the 2025-2026 season while remaining far below the levels of 2024-2025, 2023-2024, and 2022-2023. Primary care incidence also rose by 3.3 percent compared to the previous week’s 478.2 cases per 100,000 inhabitants. For comparison, the Ministry of Health noted that the 2024-2025 season left an estimated 886,000 cases, whereas the much milder 2025-2026 season recorded around 210,000.
Hospital Impacts and Mortality Fluctuations
Hospital surveillance figures captured a parallel uptick in severe acute respiratory infections, alongside an unexpected bump in general mortality metrics. Redacción médica reported that the MoMo monitoring system registered 8,332 total deaths against 7,743 projected for the autumn period, marking a 7.6% excess in fatalities. Hospital admissions for severe acute respiratory infections edged upward to 10.5 cases per 100,000 inhabitants, with SARS-CoV-2 accounting for 22.5% of hospital samples, outstripping influenza at 5.6% and VRS at 0.4%. Within those inpatient groups, Redacción médica noted that COVID-19 patients presented with pneumonia in 17.9% of cases, recorded zero intensive care unit admissions, and suffered a 7.5% lethality rate. Influenza meanwhile showed 0.4 hospital cases per 100,000 inhabitants, of which 13.3% involved pneumonia, alongside zero intensive care admissions and a 0% lethality rate.
Pediatric Bronchiolitis Surges Among Infants
While adult populations experienced the brunt of COVID-19 hospitalizations, pediatric clinics managed a sharp ascent in bronchiolitis cases linked to the respiratory syncytial virus. 20Minutos reported that the rate of bronchiolitis and bronchitis in children under five climbed for three consecutive weeks following the start of the school term, moving from 194.3 to 206.8 cases per 100,000 inhabitants. The impact concentrated most heavily on infants under one year old, who registered a staggering 3,622 respiratory cases per 100,000 inhabitants according to El País data, though 20Minutos noted that actual hospital admission rates for these young cohorts remained low at roughly 0.2 per 100,000. Additionally, children aged one to four years recorded an incidence of 2,080 cases per 100,000 inhabitants. The general upward movement was also visible in older cohorts, with infections among adults aged 60 to 69 rising from 27 to 31.2 cases per 100,000 inhabitants, and holding steady around 40 cases per 100,000 for those aged 70 to 79, while individuals over 80 saw their rate climb from 490.3 to 559.6 cases per 100,000 inhabitants.
Vaccine Rollout Schedules and Expectations
Health authorities across Spain rolled out simultaneous vaccination campaigns against seasonal influenza and COVID-19 to shield vulnerable demographics ahead of deeper autumn weather. The Ministry of Health recommended the updated XFG-variant COVID-19 vaccine for individuals over 70, residents of long-term care facilities, pregnant women, and high-risk patients. María del Mar Tomás, spokesperson for the Sociedad Española de Enfermedades Infecciosas y Microbiología Clínica (SEIMC), attributed the initial wave to waning population immunity and increased indoor crowding after summer, emphasizing to Diario Sanitario that the updated jab functions like a coat that does not prevent you from feeling the cold, but prevents it from ending in pneumonia
rather than halting transmission entirely. Meanwhile, the World Health Organization has kept the BA.3.2 variant under surveillance since December 2025 without finding indications that it causes more severe disease.
