In a statement, the DGS reveals that most infections were reported in Lisbon and Vale do Tejo, but there are also cases in the North and Algarve regions.

"All confirmed cases are in men between the ages of 26 and 61, with the majority under 40 years of age," the note adds.

The DGS reminds that "individuals who present ulcerative lesions, skin rash, palpable lymph nodes, possibly accompanied by fever, chills, headaches, muscle pain and tiredness, should seek clinical advice".