Recently, a multi-part series in the New York Times focused on novel uses of immunotherapy to fight cancer. In support of NIH scientists and clinicians engaged in this research, the NIH Library provides access to online books and journals on immunotherapy and related topics.
The Greek letter π is the symbol for the irrational number representing the ratio of the circumference of a circle to its diameter. It is approximately 3.1415926. Pi Day is an annual celebration on March 14th (3/14), with this year’s being a very special Pi Day (3/14/15).