How Munched Is That Birdie in the Window? supposedly tries to get Bart and Santa's Little Helper to like each other again." How Munched Is That Birdie in the Window? "How Munched Is That Birdie in the Window?" is the seventh episode of "The Simpsons"<nowiki>'</nowiki> twenty-second season. It originally aired on the Fox network in the United States on November 28, 2010. The title of the episode is a reference to the 1952 song "How Much is that Doggie in the Window". During a thunderstorm (literally caused by angels bowling), Homer tells a scary story to his children, and a homing pigeon named Raymond Bird by his owner
T helper cell because such knowledge may be very useful in the treatment of disease and in increasing the effectiveness of vaccination. Proliferating helper T cells that develop into effector T cells differentiate into two major subtypes of cells known as T1 and T2 cells (also known as Type 1 and Type 2 helper T cells, respectively). T1 helper cells lead to an increased cell-mediated response, typically against intracellular bacteria and protozoa. They are triggered by IL-12 and their effector cytokines are IFN-γ and IL-2. The main effector cells of T1 immunity are macrophages as well as CD8 T cells, IgG B cells,