What is it: Lassa fever is an acute viral illness that occurs in West Africa. It is highly contagious and occurs mainly in the dry season in West Africa, particularly Guinea, Liberia, Nigeria, Sierra Leone, and the DRC.

How do I get it: Rodents shed the virus in urine and droppings which means that the virus can be transmitted through direct contact with these materials, through touching objects or eating food contaminated with these materials, or through cuts or sores.

What happens if I get it: Symptoms of Lassa Fever typically occur 1-3 weeks after the patient comes into contact with the virus. These include: fever, pain behind the chest wall, sore throat, back pain, cough, abdominal pain, vomiting, diarrhoea and a rash. After four weeks occur: bleeding, ascites and shock. Death occurs in 50 % of patients.

Diagnose and treatment: the virus can be detected in blood and urine. The anti-viral agent Ribavarin can be used, otherwise it is a question of symptom control and intensive care.

How can I avoid contracting Lassa fever: avoid contact with rodents.