Answer:
The three countries that had widespread infection during the 2013 to 2016 outbreak of the Ebola virus were Liberia, Sierra Leone and Guinea.
Step-by-step explanation:
The 2014-2016 Ebola epidemic was the largest epidemic outbreak of the Ebola virus disease, originated in December 2013 in Guinea, and subsequently extended to Liberia, Sierra Leone, Nigeria, Senegal, United States, Spain, Mali and the United Kingdom. The WHO declared the end of the public health emergency of international importance on March 29, 2016.
Several organizations, including the Centers for Disease Control and Prevention, the European Commission and the Economic Community of West African States, provided funds to help counteract the spread. This outbreak was the most serious of those recorded both in terms of patients and deceased, with a mortality rate of about 70%, fulfilling for the Emergency Committee convened by WHO the conditions to declare a health emergency public of international importance.
Additionally, there was another outbreak in the Democratic Republic of the Congo that comes from a different strain and is not related to the other countries, although the country's authorities gave it as controlled in November 2014.
A total of 28,646 confirmed cases were produced, of which 11,353 ended with the death of the patient. Altogether, Liberia, Sierra Leone and Guinea grouped 28,610 cases and 11,308 deaths.