Yellow fever is an acute viral hemorrhagic disease that is transmitted by the bite of the femalemosquitoes – Aedes aegypti that are mostly found in South America and Africa, but not Asia. In 1900s, it was considered as the most dangerous infectious fever. With yellow fever, the patient gets a fever, nausea, and muscle pain. These symptoms however subside in a few days. However, in severe cases, there is a toxic phase where it causes damage to the liver along with jaundice putting the life of patients at risk. What this dangerous virus does is that it attacks the lymphatic system and vital organs by posing a threat to life and thus makes its way to the list of Top 10 Most Dangerous Viruses for Your Health.