Deadlier and more transmissible than previous forms, the mpox strain surging in the Democratic Republic of Congo (DRC) since September, known as the Clade Ib subclade, is spread person-to-person.
Illustration of a man with a rash caused by infection with a pox virus (family Poxviridae) and a close-up of one such virus particle. (Photo by KATERYNA KON / Science Photo Library via AFP)