(CNN) -- As hospitals in nations hardest hit by Ebola
struggle to keep up, desperate patients are turning to the
black market to buy blood from survivors of the virus, the
World Health Organization warned.
The deadliest Ebola outbreak in history has killed at least
2,400 people in Guinea, Liberia and Sierra Leone -- the
countries most affected by the virus.
Thousands more are infected, and new cases have emerged in Nigeria and Senegal.
Blood from survivors, referred to as convalescent serum, is
said to have antibodies that can fight the deadly virus.
Though unproven, it has provided some promise in fighting
a disease with no approved drug to treat it.
"Studies suggest blood transfusions from survivors might prevent or treat Ebola virus infection in others, but the results of the studies are still difficult to interpret," the WHO said.
"It is not known whether antibodies in the
plasma of survivors are sufficient to treat or
prevent the disease. More research is needed."
Convalescent serum has been used to treat
patients, including American aid worker Rick
Sacra, who is hospitalized in Omaha, Nebraska.
He got blood from Kent Brantly, a fellow
American who survived Ebola. Both got infected
when they were helping patients in Liberia.
Illicit trade
But unlike their situation, patients in affected
nations are getting blood through improper
channels. The illicit trade can lead to the spread
of other infections, including HIV and other
blood-related ailments.
"We need to work very closely with the affected
countries to stem out black market trading of
convalescent serum for two reasons," Margaret
Chan, the WHO's director-general, said this week.
"Because it is in the interest of individuals not to just get
convalescent serum without ... going through the proper
standard and the proper testing because it is important that
there may be other infectious vectors that we need to look
at."
'Just sitting, waiting to die'
Heath experts have declared the disease a global
emergency and criticized the international community for a
lax response.
President Barack Obama on Tuesday announced the United
States will send troops, material to build field hospitals,
additional health care workers and community care kits to
affected nations. The United States will also create a facility
to help train thousands of health care workers to identify
and care for Ebola patients.
"Men and women and children are just sitting,
waiting to die right now," Obama said.
Hospitals in affected nations are overwhelmed,
and the WHO has described the outbreak as a
"dire emergency with ... unprecedented
dimensions" of human suffering.
"If the outbreak is not stopped now, we could be
looking at hundreds of thousands of people
infected with profound political and economic
and security implications for all of us," Obama
said.
Could the virus mutate?
There is also a concern that the virus could
mutate into an even more dangerous form.
Ebola currently transmits only though contact
with bodily fluids; a mutation that allows the
virus to spread through the air would pose a
catastrophic threat to people worldwide,
experts say.
Another aid worker infected
Meanwhile, a French volunteer with Doctors Without Borders
contracted Ebola in Liberia and will be taken to France for
further treatment, the group said Thursday.
A private American plane will be used for the evacuation,
according to the organization, which is known by its French
acronym, MSF.

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