Washington, Shawwal 6, 1435, Aug 2, 2014, SPA -- US officials rushed to calm nerves around the country over the news that two US citizens infected with Ebola were to arrive back in the country Saturday from Liberia, according to dpa. The patients will be transported on specially equipped non-commercial aircraft and will be isolated at Emory University in Atlanta, Georgia, near the Centers for Disease Control (CDC), the State Department said. It is one of only four hospitals in the US capable of handling the level of isolation required by the highly virulent virus, Dr Bruce Ribner of Emory Univesity said. "I will be one of the individuals who will be coming into direct contact with the patients. I have no concerns about my personal health or the health of other medical personnel working with me," he said. Nonetheless, many people were unsettled by the spectre of an Ebola hot zone spreading in the United States in the country's first direct exposure to the disease. They "better have that Ebola patient in a bubble when he land in Atlanta," tweeted ؟@lilduval. "It's just a bad idea, plain and simple," a skeptic wrote in a blog in the Atlanta Journal-Constitution newspaper. Many wondered why it was necessary to bring back the two medical personnel now. "These are Americans who went over there to help Ebola patients," CDC director Thomas Frieden said. "They deserve the best medical care they can get to try to resolve this infection." He said health facilities in West Africa, where Ebola has killed more than 700 people and shows little signs of stopping, were inadequate to provide the sort of therapy that US hospitals can. President Obama said there would be no danger from the leaders of some 50 African countries who will be arriving in Washington for a summit meeting that starts on Monday. "We're taking the appropriate precautions," he said. He said the participants coming from countries that have "even a marginal risk or an infinitesimal risk of having been exposed in some fashion, we're making sure we're doing screening." "We'll do additional screening when we're here," he said. Aid organization Samaritan's Purse said Dr Kent Brantly and Nancy Writebol were in serious condition in Liberia and that medical evacuation efforts were under way. State Department spokeswoman Marie Harf said precautions were being taken to move the patients safely and securely, and "maintain strict isolation upon arrival in the United States." The Defense Department said the aircraft carrying the patients - apparently in flights several days apart - are to land at an Atlanta-area military base. One US physician, Alan Jamison, had been treating Ebola patients in West Africa but was pulled out by his aid organization in recent days. He told CBS News that he had put himself in quarantine in his home in Morristown, Tennessee, as soon as he returned, even though he has not had any symptoms of the disease. "I'm just being cautious," the pediatrician said. The disease has a 21-day incubation period. The deadly Ebola virus has infected more than 1,300 people in the West African nations of Guinea, Liberia, Sierra Leone and Nigeria since March. More than 700 have died, according to the World Health Organisation (WHO). It warned Friday of possibly "catastrophic" consequences from the Ebola outbreak. "This outbreak is moving faster than our efforts to control it," said WHO director-general Dr Margaret Chan during an emergency summit in Conakry, Guinea. But Obama pointed out that the virus is "not something that is easily transmitted." Ebola can only be transmitted through vomit, blood or infected stool. Obama said the United States would have to help the countries that are trying to identify, quarantine and isolate infected people and ensure that practices are in place to avoid transmission. --SPA 14:59 LOCAL TIME 11:59 GMT www.spa.gov.sa/w