has a microbiological test been carried out this year for patient 14621?
select count(*)>0 from microbiologyevents where microbiologyevents.hadm_id in ( select admissions.hadm_id from admissions where admissions.subject_id = 14621 ) and datetime(microbiologyevents.charttime,'start of year') = datetime(current_time,'start of year','-0 year')