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.
Posttransplant lymphoproliferative disorder (PTLD) is a group of lymphatic and plasmacytic proliferations arising in the setting of immunosuppression after transplantation. Histologically, their spectrum ranges from polyclonal early lesions to monomorphic lymphoma.