By Denise Grady
Yet another set of ominous
projections about the Ebola epidemic in West Africa was released Tuesday, in a
report from the Centers for Disease Control and Prevention that gave worst- and
best-case estimates for Liberia and Sierra Leone based on computer modeling.
In the worst-case scenario,
Liberia and Sierra Leone could have 21,000 cases of Ebola by Sept. 30 and 1.4
million cases by Jan. 20 if the disease keeps spreading without effective
methods to contain it. These figures take into account the fact that many cases
go undetected, and estimate that there are actually 2.5 times as many as
reported.
The report does not include
figures for Guinea because case counts there have gone up and down in ways that
cannot be reliably modeled.
In the best-case model — which
assumes that the dead are buried safely and that 70 percent of patients are
treated in settings that reduce the risk of transmission — the epidemic in both
countries would be “almost ended” by Jan. 20, the report said. It showed the
proportion of patients now in such settings as about 18 percent in Liberia and
40 percent in Sierra Leone.
“My gut feeling is, the actions
we’re taking now are going to make that worst-case scenario not come to pass,”
Dr. Thomas R. Frieden, the C.D.C. director, said in a telephone interview. “But
it’s important to understand that it could happen.”
The figures in the C.D.C.
report are based on data from August, but Dr. Frieden said the situation
appeared to have improved since then because more aid had begun to reach the
region.
The current official case count
is 5,843, including 2,803 deaths, according to the World Health Organization.
The W.H.O. published its own
revised estimates of the outbreak on Monday, predicting more than 20,000 cases
by Nov. 2 if control does not improve. That figure is more conservative than
the one from the C.D.C., but the W.H.O. report noted that many cases were
unreported and said that without effective help, the three most affected
countries would soon be reporting thousands of cases and deaths per week. It
said its projections were similar to those from the C.D.C.
The W.H.O. report also, for the
first time, raised the possibility that the disease would not be stopped but
would become endemic in West Africa, meaning that it could become a constant
presence there. The report from the C.D.C. did not discuss that possibility,
but it is something that health officials have feared all along, and the reason
they say help is needed so quickly.
President Obama’s promise last
week to send 3,000 military personnel to Liberia and to build 17 hospitals
there, each with 100 beds, were part of the solution, Dr. Frieden said. He said
the Defense Department had already delivered parts of a 25-bed unit that will
soon be set up to treat health workers who become infected, a safety measure he
said was important to help encourage health professionals to volunteer. He
added that aid groups were flooding into the region and setting up treatment
centers.
The W.H.O. reported on
Wednesday that a new treatment center had just opened in Monrovia, the Liberian
capital, with 120 beds for treatment and 30 for triage. Patients were already
lined up at the door.
The report from the C.D.C.
acknowledged that case counts were rising faster than hospital beds could be
provided. It said that in the meantime, different types of treatment would be
used, based in homes or community centers, with relatives and others being
given protective gear to help keep the disease from spreading.
The United States government is
also sending 400,000 kits containing gloves and disinfectant to Liberia to help
families take care of patients at home. The kits reflect the recognition that
even the most ambitious new program will not be able to add hospital beds fast
enough to keep up with the disease.
At least one aid group working
in Liberia is already shifting its focus to teaching people about home care and
providing materials to help. Ken Isaacs, a vice president of the aid group
Samaritan’s Purse, said, “I believe inevitably this is going to move into
people’s houses, and the notion of home-based care has to play a more prominent
role.” He said there could be 100,000 or more cases by the end of 2014.
Though providing home-care kits
may seem like a pragmatic approach, some public health authorities said they
were no substitute for beds in isolation or containment wards.
But Dr. Frieden said that home
care had been used to help stamp out smallpox in Africa during the 1960s. The
caregivers were often people who had survived smallpox themselves and were
immune to it. Some experts have suggested that Ebola survivors might also be
employed to care for the sick.
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