Most of the known cases in Europe have been among men who have sex with men, according to authorities in Britain, Spain, Germany and Portugal. (Unidad de Microscopía Electrónica del ISCIII, via AP) Show More Show Less Health authorities in Europe, North America, Israel and Australia have identified more than 100 cases of monkeypox in recent days.

(Unidad de Microscopía Electrónica del ISCIII, via AP) Show More Show Less 2 of3 In this photo provided by the Unidad de Microscopía Electrónica del ISCIII in Madrid, on Thursday May 26, 2022, an electronic microscope image shows the monkeypox virus seen by a team from the Arbovirus Laboratory and the Genomics and Bioinformatics Units of the Carlos III Health Institute (ISCIII) in Madrid.

1 of3 In this photo provided by the Unidad de Microscopía Electrónica del ISCIII in Madrid, on Thursday May 26, 2022, an electronic microscope image shows the monkeypox virus seen by a team from the Arbovirus Laboratory and the Genomics and Bioinformatics Units of the Carlos III Health Institute (ISCIII) in Madrid.