"care_home_id","participant_ID","date_specimen","specimen_result","test_date" 2,2000021,2017-09-26,"negative",NA 2,2000027,2017-09-14,"negative",NA 2,2000015,2017-09-18,"negative",NA 2,2000017,2017-09-18,"negative",NA 1,1000037,2017-09-15,"norovirus",NA 1,1000060,2017-09-19,"negative",NA 1,1000044,2017-09-15,"negative",NA 3,3000040,2018-09-13,"negative",NA 3,3000066,2018-09-13,"negative",NA 3,3000068,2018-09-21,"negative",NA 3,3000069,2018-09-13,"negative",NA 3,3000067,2018-09-21,"negative",NA 4,4000025,2018-11-28,"norovirus",NA 4,4000029,2018-11-27,"negative",NA 4,4000020,2018-11-28,"norovirus",NA