Small outbreaks of monkeypox, a disease rarely seen outside Africa, have now been reported in four Western countries, with a cluster in England predominantly affecting men who have sex with men, health authorities say. 

UK health officials are now advising individuals — particularly those who are gay, bisexual or men who have sex with men (MSM) — to be alert to any unusual rashes or lesions on any part of their body, especially genitalia.