evidence: The U.S. keeps two vaccines for smallpox approved by the Food and Drug Administration in the Strategic National Stockpile — a product, in part, of a 9/11-enhanced fear of bioterrorism. The monkeypox virus is similar enough that researchers expect both shots to offer protection, although only one, called Jynneos, has been FDA-approved for use against monkeypox. [...] Jynneos is approved to treat smallpox in Europe under the name Imvanex. On Tuesday, France’s health authority recommended it for adults who’ve had contact with a confirmed case of monkeypox, including healthcare workers. Germany also ordered 40,000 doses of Imvanex to deploy if its outbreak gets worse. [...] To quell the new monkeypox outbreaks, public health leaders are likely to look to the past. Smallpox was controlled through mass vaccination and with a so-called ring strategy, in which people who were contacts of those with smallpox got vaccines.