A two-dose vaccine, Jynneos, is approved for monkeypox in the U.S. The government has many more doses of an older smallpox vaccine — ACAM2000 — that they say could also be used, but that vaccine is considered to have a greater risk of side effects and is not recommended for people who have HIV. So it’s the Jynneos vaccine that officials have been trying to use as a primary weapon against the monkeypox outbreak.
So far, the government has…