First discovered in 1976 in South Sudan and Democratic Republic of Congo. Six species exist, four causing severe disease in humans. Likely originated from African fruit bats as natural reservoir
Ebola was discovered in 1976 near the Ebola river in northern DRC. Five virus strains exist, four of which can cause disease in humans. Bats are likely the natural reservoir host
Intersemiotic translation involves interpreting linguistic signs through non-verbal resources. The concept of resemiotisation focuses on how meanings shift between semiotic systems. Halliday's systemic functional theory provides a unified framework for multimodal analysis
VHFs are diverse illnesses caused by five RNA virus families. All types cause fever and bleeding disorders. Symptoms range from mild to life-threatening. Some viruses can cause severe disease like Ebola
Ebola is a viral hemorrhagic fever caused by ebolaviruses. Symptoms typically appear 2-3 weeks after infection. Initial symptoms include fever, sore throat, muscle pain, and headaches. Disease kills 25-90% of infected, with average 50% survival rate. Death occurs 6-16 days after symptoms appear
Case fatality rate (CFR) shows proportion of diagnosed disease patients dying. Infection fatality rate (IFR) includes asymptomatic and undiagnosed infections. CFR cannot exceed IFR and is often lower but harder to calculate