WHO has declared a public health emergency of global concern over a new strain of a deadly virus causing more than 500 deaths. The disease, known as mpox, can spread rapidly and has been reported in several countries. The UK has seen a spike in cases, prompting vaccination efforts. The WHO is calling for a coordinated international response to contain the outbreaks and save lives. The virus poses a risk globally, and efforts are underway to curb its spread in Africa and beyond.