Teacher:Given a text, write a compressed version of it in a single sentence.
Teacher: Now, understand the problem? Solve this instance: But how big of a Ping-Pong ball in shape space is covered by one antibody? Oster and Perelson reasoned that in order for an immune system to protect an organism against disease, its antibody repertoire should cover a reasonable fraction of shape space.
Student:
How big of a Ping-Pong ball is covered by one antibody? Oster and Perelson said for an immune system to protect against disease, its antibody should cover a fraction of space.