Moderna’s mpox vaccine prevents severe symptoms in monkeys compared to Bavarian Nordic’s Jynneos

A new type of mpox, clade Ib, has been spreading rapidly within the Democratic Republic of Congo and leaking outside the African nation’s borders since Sept. 2023. In response, the World Health Organization (WHO) declared the outbreak a public health emergency of international concern (PHEIC) last month, the second such declaration for an mpox variant in the past two years.