The announcement came the day after the World Health Organization declared mpox a global public health emergency.

Sweden said Thursday that it had confirmed a case of the more contagious version of mpox currently circulating in central and eastern Africa.

It is the first known infection of the strain outside of Africa.

On Wednesday, the World Health Organization declared mpox — formerly known as monkeypox — a global public health emergency for the second time in two years, following an outbreak in the Democratic Republic of Congo that has spread to 12 other countries in the region.