Rwanda has boosted travel restrictions to stem the spread of the Ebola virus, ordering travelers who have been in the United States and Spain to send daily updates, the health minister said Wednesday.

"Every day... they should call us or send an internet message," stating their health condition, Minister of Health Agnes Binagwaho told Agence France Presse.

The U.S. government is closing a gap in Ebola screening at airports while states from New York to Texas to California work to get hospitals and nurses ready in case another patient turns up somewhere in the U.S. with the deadly disease.

Under the rule going into effect Wednesday, air travelers from the West African nations of Liberia, Sierra Leone and Guinea must enter the United States through one of five airports doing special screenings and fever checks for Ebola. A handful of people had been arriving at other airports and missing the checks.

The Ebola epidemic will take at least four months to contain even if all necessary steps are taken, the global head of the Red Cross said Wednesday, warning of "the price for inaction".

The deadliest-ever outbreak of the haemorrhagic fever has claimed more than 4,500 lives in West Africa, and experts warn the rate of infections could reach 10,000 a week by early December.

A paralyzed Bulgarian man can walk again after receiving revolutionary treatment in Poland in a breakthrough hailed by one of the British scientists responsible as "more impressive than a man walking on the moon".

Darek Fidyka was paralyzed from the chest down following a knife attack in 2010, but can now walk using a frame after receiving treatment in which nerve cells from his nose were transplanted into his severed spinal column, according to research published in the journal Cell Transplantation on Tuesday.

Screening air travelers on departure from Ebola-hit countries is far smarter than monitoring them when they arrive abroad, experts said on Tuesday.

Instead of relying on a shield at their own borders, countries should help Liberia, Guinea and Sierra Leone boost capacity to spot Ebola cases, they said.

Giving animals antibiotics may make them sicker and could lead some to spread even more salmonella than they would have otherwise, U.S. researchers experimenting on mice said Monday.

The findings in the Proceedings of the National Academy of Sciences could point to a new concern over feeding healthy livestock low doses of antibiotics to help them grow and stave off common illnesses, a practice that critics say may fuel drug-resistant superbugs.

With no new Ebola cases in five days, U.S. authorities were cautious but hopeful Monday that the virus has been contained in the United States after a flawed response revealed shortcomings in the system.

The fiancee of a Liberian man who died of Ebola earlier this month in Dallas, Texas was among nearly 50 people who emerged from three weeks of quarantine without any signs of illness from exposure to the virus that has killed more than 4,500 in West Africa since the beginning of this year.

A U.N. staff member in Sierra Leone has died from Ebola, the third employee from the world organization to succumb to the deadly virus, the U.N. spokesman said Monday.

The man, who was a driver for the U.N. Women agency, passed away at the weekend in Sierra Leone and his spouse is currently receiving treatment, said spokesman Stephane Dujarric.

Nigeria -- Africa's most populous country -- was declared Ebola-free on Monday as European Union foreign ministers thrashed out measures to help halt the spread of the deadly disease.

The World Health Organization said Nigeria's was a "spectacular success story that shows to the world that Ebola can be contained" as the country, where eight people died from the outbreak, defeated the disease.

The Brave Heart Fund BHF affiliated with the Children's Heart Center at the American University of Beirut Medical Center (AUBMC) has lately launched a video to help raise awareness on congenital heart disease.

In the video, a bus full of children blocks the heart of the city. Children descend, line-up and start singing. A banner with a slogan “we blocked the heart of the city to unblock the hearts of the children,” is raised.