Health in the Democratic Republic of the Congo use is widely accepted if the cost of the vaccine is free. However, the limited supply of OCV can be expensive (approximately $3.70 USD), limiting its widespread use. A final preventive measure to assist in prevention, controlling and treating cholera would be the use of a national database such as IDSR//International Health Regulation. The database would allow the countries to communicate and collaborate on outbreaks, treatment, and preventive measures. This would assist in eliminating or reducing cross-border transmission outbreaks. There have been 10 outbreaks of the Ebola virus disease in the Democratic Republic of the Congo. Additionally, hemorrhagic fever, polio,
Ebola virus disease in Nigeria health care workers who had cared for Sawyer. In all, 529 contacts had been followed and of that date they had all completed a 21-day mandatory period of surveillance. On 9 October 2014, the European Centre for Disease Prevention and Control (ECDC) acknowledged Nigeria's positive role in controlling the effort to contain the Ebola outbreak. "We wish to thank the Federal Ministry of Health, Abuja, Nigeria, and the staff of the Ebola Emergency Centre who coordinated the management of cases, containment of outbreaks and treatment protocols in Nigeria." Nigeria's quick responses, including intense and rapid contact tracing, surveillance of potential