Sentence:  Viruses have ‘studied' immunology over millions of years of coevolution with their hosts. During this ongoing education they have developed countless mechanisms to escape from the host's immune system. ... These escape strategies have been described as ‘camouflage' and ‘sabotage'. Using these simple concepts we describe the spectrum of viral <WSD>escapology</WSD> ... 
Meaning of the word marked with <WSD> tags:  The study or art of escaping from a constriction, such as a rope, handcuffs, etc.