Excess mortality is the number of deaths above what would be expected based on historical averages (commonly a multi‑year baseline), and it captures deaths directly and indirectly caused by events like epidemics, heatwaves or healthcare disruptions. Portugal’s public health institute INSA (Instituto Nacional de Saúde Doutor Ricardo Jorge) monitors excess mortality to see the broader impact of seasonal illnesses and other stresses on the health system, so a drop in flu cases does not automatically mean overall mortality has returned to normal. Those following public‑health trends should note excess‑mortality figures because they show the pandemic and other factors’ continuing effect on population health.

The DGS (Direção-Geral da Saúde) is Portugal's central public health authority, responsible for setting health policy guidelines, managing vaccination programs, disease surveillance, and public health campaigns. It operates under the Ministry of Health.

The DGS issues clinical guidelines (normas) that health professionals across Portugal follow, manages the national vaccination schedule, coordinates responses to disease outbreaks, and publishes health statistics. It became widely known during the COVID-19 pandemic as the lead agency for public health guidance.

For residents, the DGS is the authoritative source for vaccination schedules, health alerts, and clinical guidance. Its recommendations shape how hospitals and health centers deliver care across the country.

The SPAIC (Sociedade Portuguesa de Alergologia e Imunologia Clínica) is the Portuguese Society of Allergology and Clinical Immunology. This professional organization monitors environmental factors like pollen levels to provide public health data and guidance for patients with respiratory allergies.

The DGS (Direção-Geral da Saúde) is Portugal's central public health authority, responsible for setting health policy guidelines, managing vaccination programs, disease surveillance, and public health campaigns. It operates under the Ministry of Health.

The DGS issues clinical guidelines (normas) that health professionals across Portugal follow, manages the national vaccination schedule, coordinates responses to disease outbreaks, and publishes health statistics. It became widely known during the COVID-19 pandemic as the lead agency for public health guidance.

For residents, the DGS is the authoritative source for vaccination schedules, health alerts, and clinical guidance. Its recommendations shape how hospitals and health centers deliver care across the country.