Assertion: lassa fever | /r/CreatedBy | virus
Facets:
Source sentences:
text: Lassa fever is caused by a virus that normally occurs in West Africa (including Guinea, Liberia, Sierra Leone, etc.).
text: Lassa Fever is a deadly hemorrhagic fever disease that is caused by a virus similar to Ebola.
text: Lassa fever is a human disease caused by a virus that resides within its natural host, the multimammate rat, Mastomys natalensis.
text: Lassa fever is a deadly disease caused by a virus carried in the urine or faeces of infected rat.