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(CNN) - Doctors combating the worst outbreak of the Ebola virus in history are concerned that false hope over experimental treatments may worsen the spread of the deadly disease.
"What we're worried about is that there is a lot of hope being put into these treatments and that it will create more confusion in the community if they don't work and it might create more fear in the community if they don't work," Dr. Estrella Lasry, a tropical medicine adviser with Doctors Without Borders, tells CNN's Jake Tapper.
There is no known effective treatments to combat Ebola, which historically kills nine in ten of those who contract the virus.
Doctors Without Border is also having difficulty accessing and treating patients infected with the disease.
"In many cases, we cannot access the places where we think there are patients and we're also stretched out at this point, in terms of responding to the epidemic," Dr. Estrella Lasry, a tropical medicine adviser with Doctors Without Borders, tells CNN's Jake Tapper. "We're asking for more implementation on the ground in order to be able to control the spread of the disease."
On Thursday, the CDC raised the health threat level to 3, the agency’s highest level. Many questioned why the threat level was not raised sooner, but Dr. Lasry is more concerned with the potential unintended consequences.
"We're worried that putting restrictions on population movements will also make the epidemic more difficult to control. We understand the worries and the worries of the different countries and the worries of the CDC, but we're also worried that if all these measures are put into place, then people will hide the disease more than they will actually access health facilities."
For more of our interview with Dr. Lasry, watch the video above.