Date and time of onset of vaccination adverse event:TmStp:Pt:^Patient:Qn
date and time of onset of vaccination adverse event:tmstp:pt:^patient:qn
Date and time of onset of vaccination adverse event:Time Stamp-Date and Time:To identify measures at a point in time:^Patient:Quantitative
date and time of onset of vaccination adverse event:time stamp-date and time:to identify measures at a point in time:^patient:quantitative