sir rickard christophers medal sir rickard christophers medal the sir rickard christophers medal, named in honour of sir rickard christophers, is awarded every three years to individuals for their work in the field of tropical medicine and hygiene. the awarding body is the royal society of tropical medicine and hygiene. recipients source: rstmh year recipient 1979david simpson 1982mick gillies 1985david lewis 1988george nelson 1991robert killick-kendrick 1994william jopling & dennis ridley 1997michael service 2000douglas barker 2003andrew davis 2006christopher curtis 2009malcolm molyneux 2012mike english 2015alan fenwick 2018bridget wills