The ongoing Marburg fever outbreak in Equatorial Guinea is significantly larger than has previously been acknowledged, according to new information released Wednesday by the World Health Organization, which warned there may be undetected chains of transmission of the deadly virus in the West African country. Even when authorities realize an outbreak is ongoing, some people who die are buried by their families before samples can be taken for testing. Patients are treated with supportive care, primarily oral or intravenous fluids to replace those lost through the vomiting and diarrhea the disease triggers