evidence: Vaccines for smallpox, a related disease, are thought to be about 85% effective against monkeypox. WHO’s Europe director, Dr. Hans Kluge, said Wednesday he was concerned by the scramble by some rich countries to buy more vaccines without talk of buying supplies for Africa. [...] 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 another 13 million. To date, the U.S. has reported 72 monkeypox cases.