Which WW2 medical technology assisted in the saving of thousands of lives from infections.
O smallpox vaccine
radar
chemotherapy
penicillin

The answer is penicillin

a structure of concepts, values, customs, views, etc., by means of which an individual or group perceives or evaluates data, communicates ideas, and regulates behavior.

Explanation:

Frame of reference is the way a person perceives the world and their surroundings.Frame of reference comes from: parents, teachers, experiences, culture, education, and the media.Also called reference frame. Physics.A framework that is used for the observation and mathematical description of physical phenomena and the formulation of physical laws, usually consisting of an observer, a coordinate system, and a clock or clocks assigning times at positions with respect to the coordinate system.A frame of reference is a set of coordinates that can be used to determine positions and velocities of objects in that frame; different frames of reference move relative to one another. ... This means that we can address problems in any reference frame to give an equivalent solution.