Lisbon, Portugal – Public health authorities in Portugal are investigating a sharp rise in mortality rates linked to a severe influenza outbreak and unusually cold temperatures [[1]]. Since the first week of december, the country has experienced a 22% increase in excess deaths compared to expected levels for this time of year, raising concerns about potential strain on the nation’s healthcare system [[3]]. The H3N1 strain is reportedly driving the surge in cases, particularly among vulnerable elderly populations, as officials urge preventative measures including vaccination and hygiene protocols.
Portuguese health officials are reporting a significant increase in mortality, with a 22% excess death rate observed since the first week of December compared to expected levels for this time of year. The rise is attributed to a combination of cold weather and a widespread influenza epidemic, according to sources within the Ministry of Health.
The current period of excess mortality is being interpreted as a result of these converging factors, with the influenza epidemic reaching epidemic levels by the end of November. This year’s epidemic began earlier than usual, and transmission has been notably rapid among older adults, who are particularly vulnerable to severe complications. This is a concerning trend, as increased mortality rates can strain healthcare systems and impact public health resources.
Specifically, the circulating H3N1 subtype of the influenza virus is believed to be contributing to the increased mortality. “The transmission has shifted more rapidly towards older age groups,” a source within the Ministry of Health explained. The rapid spread of the virus within this age group has exacerbated the situation, leading to the observed increase in deaths.
Health officials continue to monitor the situation closely and are urging individuals, especially those in high-risk groups, to take preventative measures such as vaccination and practicing good hygiene. The findings underscore the importance of ongoing surveillance and preparedness for seasonal influenza outbreaks.
