@inbook{1141966004, author={Robert B. Wallace}, title={Infections Spread by Close Personal Contact}, booktitle={Maxcy-Rosenau-Last Public Health and Preventive Medicine, 15e}, publisher={McGraw-Hill Medical}, address={New York, NY}, year={2017}, url={accessbiomedicalscience.mhmedical.com/content.aspx?aid=1141966004} }