Lassa Fever (LF) is an acute viral hemorrhagic fever disease. Meaning its caused by a virus(lassa virus) and associated with sudden fever and bleeding disorders from orifices(mouth, nose, ear, eyes, anus, vagina etc).
Simply put pneumonia is the inflammation of the substance of the lungs. It is mostly caused by bacteria(streptococcus pneumoniae, Mycoplasma pneumoniae, Haemophilia influenzae)but can be caused by viruses( eg Influenza A and B) and fungi. Pneumonia can occur in all age groups but more in the extremes of ages (children and the elderly). Conditions such as HIV infection, diabetes Mellitus, malnutrition,chronic kidney disease can predispose someone to pneumonia.