Chloe Orkin, Queen Mary University of London
Since early May, more than 23,000 cases of monkeypox have been reported worldwide. This is the largest ever global outbreak of the disease.
Cases have now been reported in 78 countries including the UK, Spain, Germany, France, the US and Brazil. Given the scale of the outbreak, the World Health Organization (WHO) has now declared the current monkeypox epidemic a global health emergency.