People have been urged not to attack monkeys after 10 were poisoned in a misguided attempt to fight the monkeypox virus.
Local reports say that the primates were targeted in Sao Jose do Rio Preto, in Sao Paulo state, causing the World Health Organisation (WHO) to warn people against it.
Cases of monkeypox have typically been rare before the outbreak but were so because of minimal transmission from monkey to human.