Most infections have been reported to date in Lisbon and Vale do Tejo, but there are also cases in the North and Algarve regions. All confirmed infections are in men between the ages of 19 and 61, with the majority being younger than 40 years.

"The identified cases remain under clinical follow-up, and are stable", says the DGS, which continues to monitor the situation at the national level in conjunction with European institutions.