The virus that is fuelling a surge in monkeypox cases globally may be mutating faster than anticipated as it spreads from person to person, a study has said, as authorities move to widen eligibility for vaccines to more groups seen to be at risk.
This evolution may explain why this strain of monkeypox appears to be more transmissible, researchers in Portugal wrote in a study published in Nature Medicine on Friday.
One of the study’s authors, João Paulo Gomes from Portugal’s National Institute of Health in Lisbon, said the world was grappling with an outbreak “caused by a virus that presents [many] more mutations than we could expect for this type of virus”.
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