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After an in-person briefing from the staff at the Centers for Disease Control and Prevention in Atlanta, President Barack Obama on Tuesday announced a "major increase" in the U.S. response to the Ebola outbreak in West Africa, CNN reported.

The United States will send troops, material to build field hospitals, additional health care workers, community care kits and badly needed medical supplies.

Countless taxis filled with families worried they've become infected with Ebola currently crisscross Monrovia in search of help.

They scour the Liberian capital, but not one clinic can take them in for treatment.

"Today, there is not one single bed available for the treatment of an Ebola patient in the entire country of Liberia," said Margaret Chan, the World Health Organization's director-general.

"As soon as a new Ebola treatment facility is opened, it immediately fills to overflowing with patients," the WHO said.

Hospitals and clinics in Guinea, Liberia and Sierra Leone -- the countries hit hardest by the outbreak -- are overwhelmed by what the WHO is calling the deadliest Ebola outbreak in history.

The virus has killed at least 2,400 people, and thousands more are infected. And there are now cases in Nigeria and Senegal.

"The number of new cases is increasing exponentially," the WHO said, calling the situation a "dire emergency with ... unprecedented dimensions of human suffering."