São Paulo Confirms Second Imported Mpox Clade 1b Case

Overview

• The case involves a 39-year-old resident of Portugal who developed symptoms in late December, was treated at Instituto de Infectologia Emílio Ribas, stayed one day in hospital, and has returned to Portugal.
• The State Health Secretariat confirmed the infection on January 10 after laboratory testing identified clade 1b.
• Authorities say no symptomatic contacts have been found at the patient’s lodging, and surveillance and contact monitoring continue.
• The first clade 1b detection in São Paulo was reported in March 2025 in a woman linked to visitors from the Democratic Republic of the Congo.
• Clade 1b has driven large outbreaks in the Democratic Republic of the Congo and neighboring countries since early 2024, with authorities reporting high totals of suspected and confirmed cases.