First, the yellow fever virus is phagocytosed by white blood cells. The phagocytosed white blood cell then travel through the lymph vessel. Since lymph node contain white blood and filter lymph, the yellow fever phagocytosed with white blood cell establish in the lymph node.
Lipase is an Enzyme protein that helps. break down fats in foods
The planet would be Neptune and Earth's average time is 365.2 days aka a full year (1 year).