The head of a major medical research charity has called the latest outbreak of Ebola in central Africa "truly frightening".
Nearly 1,400 people have died in the Democratic Republic of Congo.Dr Jeremy Farrar, the director of the Wellcome Trust, said the epidemic was the worst since that of 2013-16 and has showed "no sign of stopping".
A five-year-old boy has also died in neighbouring Uganda, the first case of Ebola reported in the country.
The Ugandan government is now reporting seven other suspected cases of the virus.
In a statement, Dr Farrar said the spread was "tragic but unfortunately not surprising". He warned that more cases were expected, and a "full" national and international response would be needed to protect lives.
"The DRC should not have to face this alone," he said.
What's the situation so far?Since the first case of Ebola in the DRC last August, nearly 1,400 people have died - around 70% of all those infected.
The outbreak is the second-largest in the history of the disease, with a significant spike in new cases in recent weeks.
Only once before has an outbreak continued to grow more than eight months after it began - that was the epidemic in West Africa between 2013-16, which killed 11,310 people.
Efforts to contain the spread have been hindered by militia group violence and by suspicion towards foreign medical assistance.
Nearly 200 health facilities have been attacked in the DRC this year, forcing health workers to suspend or delay vaccinations and treatments. In February, medical charity Médecins Sans Frontières (MSF) put its activities on hold in Butembo and Katwa - two eastern cities in the outbreak's epicentre.
In Uganda, a five-year-old boy died of the virus on Tuesday, according to the World Health Organisation (WHO).