Mexico is reporting dozens of cases of monkeypox, declared this weekend by the World Health Organization a public health emergency of international concern.

On Tuesday, national health official Hugo Lopez-Gatell said that Mexico had confirmed 60 cases, a handful of hospitalizations and no deaths so far.

More than half the cases were concentrated in Mexico City. Sonora, Arizona’s neighbor to the south, has yet to report a case, though nearby Baja California and Sinaloa each had one.

“It’s important to emphasize that it’s a very low mortality disease,” Gatell said, adding that he doesn't expect it to spread extensively.