The CDC raised its alert level for monkeypox to level 2 on Monday, recommending that travelers wear masks, among other health measures.

While not on the level of COVID-19, monkeypox has spread across the globe out of Africa since March. Monkeypox symptoms begin as relatively flu-like but soon expand to the swelling of lymph nodes and a rash across the body and face. Ultimately, painful lesions form on rash areas, leaving severe scarring.