President Joe Biden on Sunday said an outbreak of the rare disease monkeypox is a concern because “if it were to spread, it's consequential.”

“They haven’t told me the level of exposure yet, but it is something that everybody should be concerned about,” Biden told reporters before boarding Air Force One to fly from South Korea to Japan. “We’re working on it hard to figure out what we do and what vaccine, if any, might be available for it.”

Jake Sullivan, Biden's national security adviser, later told reporters the U.S. has vaccines "available to be deployed."