At the moment, the overall number of infections ranges from 643 to 650, with numerous suspected cases identified, Van Kerkhove said, adding that these infections were reported from May 13 to June 1.

Monkeypox has been reported in a total of 26 non-endemic countries across four WHO regions, she said, noting that the highest infection rate was observed in the United Kingdom with 190 cases, Spain with 142 cases, Portugal with 119 cases and Germany with 44 cases.

According to Van Kerkhove, epidemiologists currently need to assess the risk of spreading monkeypox worldwide, examine the genome of the virus and sequence it to track potential mutations.

Hundreds of monkeypox cases have been registered in European countries, Australia, and the United States since early May. Medical officers are still unsure about the ways the infection has spread since monkeypox is endemic in African countries and the majority of those infected have neither had any contact with African people nor traveled there.

Monkeypox is a rare viral disease that is usually transmitted to people from wild animals. The disease can be transmitted through body fluids, respiratory droplets, and other contaminated materials. The disease usually results in fever, rash, and swollen lymph nodes.