The 1918 flu pandemic, commonly referred to as the Spanish flu, was a category 5 influenza pandemic caused by an unusually severe and deadly Influenza A virus strain of subtype H1N1.
Project Lead The Way (PLTW) is an American nonprofit organization that develops STEM curricula for use by US elementary, middle, and high schools.
Polycystic liver disease (PLD) is the development of multiple cysts in the liver. PLD cysts may cause pain, but they usually do not affect liver function. If PLD starts affecting liver function or becomes too painful, surgery may be needed. However, cysts can reoccur after surgery.