(CNN) - The deadliest Ebola outbreak in history continues to plague West Africa as leaders scramble to stop the virus from spreading.Over the weekend, Liberian President Ellen Johnson Sirleaf closed most of the country's borders. The few points of entry that are still open will have Ebola testing centers and will implement preventive measures, she said. The president also placed restrictions on public gatherings and ordered hotels, restaurants and other entertainment venues to play a five-minute video on Ebola safety."No doubt the Ebola virus is a national health problem," Sirleaf said. "It attacks our way of life, with serious economic and social consequences. As such we are compelled to bring the totality of our national resolve to fight this scourge.