have patient 10855 been tested for absolute cd4 count since 2105?
select count(*)>0 from labevents where labevents.itemid in ( select d_labitems.itemid from d_labitems where d_labitems.label = 'absolute cd4 count' ) and labevents.hadm_id in ( select admissions.hadm_id from admissions where admissions.subject_id = 10855 ) and strftime('%y',labevents.charttime) >= '2105'