“The test came out negative, thank you for your prayers and affection,” Xinhua news agency quoted the 38-year-old as saying in an online post on Sunday.
The First Lady tested positive after her corona-sceptic husband and President Jair Bolsonaro contracted the disease on July 7.
The President announced on July 25 that he had recovered.
According to official information, Jair Bolsonaro underwent four COVID-19 tests in 18 days and tested positive thrice.
Besides the President and the First Lady, Science, Technology and Innovation Minister Marcos Pontes; Citizenship Minister Onyx Lorenzoni; Education Minister Milton Ribeiro were also tested positive in July.
Two other ministers, Bento Albuquerque, who is in charge of mines and energy, and Augusto Heleno, who heads the institutional security cabinet, tested positive in March, but quickly recovered.❐