The American doctor fighting for his life after being infected with the deadly Ebola virus says he is "terrified."
In a just-released email, Dr. Kent Brantly says: "I'm praying fervently that God will help me survive this disease."
Dr. Brantly and Nancy Writebol, the other American health worker infected with Ebola "have shown a slight improvement in the past 24 hours" according to the charity organization they work for.
We're now learning that a dose of experimental serum arrived to treat the Americans, but there was only one dose, and Dr. Brantly asked that it be given to Nancy.
Dr. Nancy Snyderman said on MSNBC, "I believe that he is not as well as she is. One dose. He said to give it to her."
There are growing fears about the deadliest Ebola outbreak in history spreading to the United States from airline passengers arriving from West Africa.
The Centers for Disease Control has just issued a health advisory to all U.S. airline flight crews about the deadly Ebola virus.
The CDC says a sick passenger should be isolated, touched only with disposable gloves, and should wear a surgical mask to reduce the risk that coughing and sneezing could spread Ebola to everyone on the plane.
All the network and cable news health and medical editors appeared live on their morning shows Thursday to answer questions and urge calm about the Ebola threat.
Dr. Richard Besser said, "I would not be surprised if we see isolated cases arrive here because you can have no symptoms for three weeks after you've been infected. But those cases would not spread it around the country. We have good hospitals and good infection control."
A prayer vigil was held for Nancy Writebol in her hometown of Charlotte, North Carolina. Her husband, David spoke to the gathering by phone from the West African nation of Liberia.
"She's sitting up and she's talking with us, she's able to move about," he said.
As he spoke, a nearby emergency room in Charlotte was closed down for seven hours with an Ebola scare after a patient who had recently travelled in Africa was admitted. It turned out to be a false alarm.
Dr. Katie Passaretti, Carolina Medical Center told INSIDE EDITION, "We erred on the side of caution and we backed off quickly once we had more information."
INSIDE EDITION viewers are weighing in on our website: "Oh my gosh that is so scary to me!!!" writes one.
"I'm not worried at all," writes another. "We have systems in place to quarantine the virus should it happen in the United States."