A humanitarian worker who was treating Ebola patients in the Democratic Republic of the Congo has been medically evacuated to a specialist London hospital for monitoring, the UK Health Security Agency (UKHSA) announced. The individual, who is not displaying any symptoms, was flown to the UK on a dedicated charter flight as a precautionary measure and is being assessed in isolation by infectious disease specialists; the Ebola incubation period can last up to 21 days. There are no confirmed Ebola cases in the UK, and authorities say the risk to the general public remains low, though an ongoing outbreak in the DRC and Uganda was classified as a public health emergency of international concern by the World Health Organization in May.