20151011_wesun_the_bacterial_cloud_we_all_carry_could_be_as_unique_as_a_fingerprint.mp3?orgId=1&topicId=1129&d=235&p=10&story=447688067&t=progseg&e=447688039&seg=7&ft=nprml&f=447688067

Copyright 2016 NPR. To see more, visit http://www.npr.org/ .