s 687 MODIFICATION OF ADULT PNEUMOCOCCAL CARRIAGE BY VACCINATION: EFFECT OF 7CONJUGATE VACCINE ON CARRIAGE IN MALAWIAN ADULTS, RESULTS FROM A RANDOMISED CONTROLLED TRIAL. Jody Aberdein , Robert Heyderman , Stephen Gordon , Herbert Longwe , T Mdezo , Maaike Aleerts , Neil French 2,1 Malawi-Liverpool Wellcome Clinical Research Unit & University of Malawi College of Medicine, Blantyre, Malawi 2 Institute of Infection and Global Health, University of Liverpool, Liverpool, UK Division of Infection and Immunity, University College London, UK