Health officials in the United States on Thursday (31/7) warned their citizens not to travel to three countries in West Africa that was hit by the worst outbreak of Ebola in history.
The warning applies to non-essential three West African countries namely travel, Guinea, Liberia and Sierra Leone, where the deadly disease has killed more than 700 people this year.
"The bottom line is, Ebola worse in West Africa," said Dr. Tom Frieden, Director of the Center for Disease Control and Prevention (CDC) announced that the travel warning.
It Ebola called a "tragic, terrible and merciless virus."
The purpose of the trip was not only a warning to travelers to protect the United States, it restricts the use of clinics and hospitals for other diseases.
The last time the CDC issued a high alert level in 2003 because of an outbreak of SARS in Asia. However, the World Health Organization (WHO) has not issued a similar warning for West Africa trip.
Outbreaks of the deadly Ebola virus is currently the largest in history. The virus first appeared in Africa 40 years ago. The virus is contagious and is spread through direct contact with blood or body fluids of patients. Ebola is not spread through casual contact, such as colds or breathing the same air.
Experts estimate that about 60 percent of people who develop Ebola has died, a mortality rate that is higher fear of any disease. So far there is no vaccine or specific treatment for Ebola handle.