The U.S. has distributed 1,200 doses of vaccine across the U.S. for people who have had high risk exposures to monkeypox.The U.S. has two vaccines in its national stockpile that can be used against monkeypox.Jynneos is a newer generation two-dose vaccine approved to prevent monkeypox, while ACAM2000 is an older generation smallpox vaccine that can have serious side effects.Most people who catch monkeypox generally recover in two to four weeks without specific medical treatment.