The National Center for Disease Control (NCDC) has warned against traveling to Tanzania, Equatorial Guinea and Burundi, except when absolutely necessary, due to the outbreak of the Marburg virus there.

In a statement issued on Monday, the NCDC called on travelers to those countries to take a number of precautions, especially avoiding contact with the patients who show symptoms such as fever, muscle pain and rash, and to avoid areas where the virus is spread in those countries.

The NCDC also asked travelers to avoid contact with blood and other body fluids, not to visit caves and mines where bats live, and to avoid contact with animals such as chimpanzees and gorillas.

It recommended isolating or quarantining travelers coming from those countries, going to the nearest health institution and informing doctors when symptoms appear, which include also sore throat, diarrhea, weakness, vomiting, stomach pain or unjustified bleeding from anywhere in the body or bruises. It said the period of isolation or quarantine should last 21 days.