evidence: The U.S. government is buying more monkeypox vaccine as a surprising international outbreak continues to grow. [...] The official said the U.S. had returned more than 200,000 doses of a smallpox vaccine to the manufacturer so they would be available to others. The official declined to say if the U.S. considers the current monkeypox outbreak an emergency that warrants the release of the 20 million pledged vaccines. According to the health data and analytics firm Airfinity, the U.S. has at least 1.4 million doses of vaccine and has ordered an additional 13 million. To date, the U.S. has reported 72 monkeypox cases.