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The virus is named for the German city of Marburg, where laboratory technicians performing necropsies on imported African green monkeys in 1967 became infected.

African green monkeys and pigs can carry it.

The Egyptian rousette fruit bat often harbours the virus, but African green monkeys and pigs can also carry it.

At least seven deaths were reported in that outbreak, with the first people infected having been exposed to Ugandan imported African green monkeys or their tissue while conducting lab research, the CDC said.

African green monkeys and pigs can also carry it.