A Syrian boy receives treatment at a hospital in  Aleppo on Saturday. Official Syrian media accused the armed opposition of launching an attack with “toxic gas” on the northern city, but a leading rebel alliance has denied any involvement. Photograph:  George Ourfalian/AFP/Getty Images

The global chemical weapons agency will investigate an alleged gas attack in Aleppo, Syria on Saturday that reportedly wounded up to 100 people, the h(...)

An International Red Cross Committee staff member walks in front of a quarantine zone at the hospital of Wangata in Mbandaka on Tuesday. Photograph: Junior D Kannah/AFP/Getty Images

Three patients infected with the deadly Ebola virus slipped out of an isolation ward at a hospital in the Congolese city of Mbandaka, an aid group sai(...)

A health official uses a thermometer to measure the temperature of disembarking passengers at the airport at Mbandaka, Congo.  Photograph: AFP/Junior Kannah/ Getty Images

Health workers in Democratic Republic of Congo will begin a vaccination campaign on Monday aimed at containing an outbreak of the deadly Ebola virus,(...)

Syrians inspect damaged buildings after air strikes by government helicopters on the rebel-held Aleppo neighbourhood of Mashhad on Tuesday. Photograph:  Syrian Civil Defence White Helmets via AP

Syrian government forces and their allies attacked the opposition-held sector of Aleppo on several fronts on Tuesday, the biggest ground assault yet i(...)

A photo provided by the Syrian civil defence group known as the White Helmets, shows members of inspecting damaged buildings after airstrikes hit the Bustan al-Qasr neighbourhood of Aleppo on Sunday. Photograph: AP

Medical supplies were running out in the besieged rebel-held sector of Aleppo, with victims pouring into barely functioning hospitals as an all-out R(...)

A girl stands near Syria Democratic Forces fighters on a damaged street in Manbij, in Aleppo Governorate, Syria, on August 7th. Photograph: Rodi Said/Reuters

The United Nations called on Tuesday for an urgent ceasefire in the divided Syrian city of Aleppo, where it said two million people lacked access to (...)