In an excoriating attack on the response to the long-running outbreak in Democratic Republic of Congo Dr Joanne Liu, global president of Médecins Sans Frontières, said that the current atmosphere in the region was "toxic".
Two of her organization's treatment centers were attacked in the last two weeks, prompting the group to close them.
"The use of coercion adds fuel to this, using police to force people into complying with health measures is not only unethical, it is totally counterproductive", she said.
There have been dozens of attacks on health workers - meanwhile Ebola victims stay in hiding, no-one knows where they are or who they have been in contact with. It said there's a misunderstanding about the role of law enforcement in the outbreak areas and that police and military are not involved in response activities and their role has never been to force compliance with sanitary measures.
There have been "30 different incidents and attacks against elements of the response" to the outbreak, according to Doctors Without Borders.
A World Health Organization worker administers a vaccination during the launch of a campaign aimed at beating an outbreak of Ebola in the port city of Mbandaka, Democratic Republic of Congo, on 21 May 2018.
Amid the turmoil, health workers and emergency responders have struggled to win the cooperation of affected communities, many of which are deeply distrustful of the government and a rollout of medical strategies - supervised by security forces - which have clashed with local customs.
Liu said there are signs the Ebola outbreak in Congo - the second worst in the world's history - was not being brought under control.
"The existing atmosphere can only be described as toxic".
She said aid groups needed to rethink their tactics and offer help in ways that the community would accept, even if it meant helping families to safely care for Ebola patients at home rather than in isolation units. "They see relatives buried without ceremony and see their possessions burned", she said.
"Ebola still has the upper hand", Liu says. Since the beginning of the year, more than 40% of new cases are people who died of Ebola in the communities.
MSF, which is active across DRC, is considering whether to resume activities in the two areas, but is intent on avoiding the use of security personnel on site or in rounding up patients, Liu said. "Thirty-five percent of people are not known for the chain of transmission, which means we don't know where they got it from", the worldwide president of Medecins Sans Frontieres (MSF) charity said during a press conference on Thursday.