- In the 2 days immediately after influenza immunization, study participants socially encountered almost twice as many other humans as they did in the 2 days before immunization CHRIS REIBER, PHD, MPH, ERIC C. SHATTUCK, MS, SEAN FIORE, MS, PAULINE ALPERIN, MS, VANESSA DAVIS, MS, AND JANICE MOORE, PHD PURPOSE: The purpose of…