Ebola is back with a vengeance.
Experts know from the 2014 epidemic that when the deadly virus crosses borders it sticks around for awhile.
Tom Price is in the West African country to survey its post-Ebola recovery and offer U.S. support.
The vaccine as one important tool in controlling future outbreaks of Ebola.
Four people have died from the virus since February 29.
Health authorities are still looking for 48 people who may be carrying the virus.
The case came hours after West Africa was declared Ebola-free on Thursday.
What began as a fight over a mango quickly morphed into a massive, Ebola-related public health crisis.
The American healthcare worker tested positive for the Ebola virus while working in Sierra Leone.
The vaccine led the patient to develop antibodies against the Ebola virus.
The technician was working on Monday with Ebola specimens that were supposed to have been inactivated but which may instead have contained live virus.
Cuba wins praise for sending doctors to fight Ebola, but critics question Havana's motives
President Barack Obama urged Congress on Tuesday to approve $6.18 billion to help fight the Ebola outbreak, reminding them that even though the story has faded from the headlines, the battle against the virus is far from over.
The surgeon, who is a legal permanent resident of the U.S., reportedly will be treated at Nebraska Medical Center.
Humanitarian organization Médecins Sans Frontières will host trials by European researchers of two drugs and blood plasma therapy at its treatment centers in countries most affected by the Ebola outbreak.
Dr. Craig Spencer urged Americans to turn their attention back to West Africa.