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.
uk â /plÊk/ us â /plÊk/. âº [ T ] to pull something, especially with a sudden movement, in order to remove it: Caged birds sometimes pluck out their breast feathers.