presampling activity 2021-04-24T00:42:14Z A data field which describes the activities or variables introduced upstream of sample collection that may affect the sample collected. PCDS: If there was an activity that would affect the sample prior to collection (this is different than sample processing), provide the activities by selecting one or more values from the template pick list. If the information is unknown or cannot be provided, leave blank or provide a null value. metadata incomplete PCDS: The upstream activities or variables that may affect the sample collected. PCDS: Vaccination PCDS:presampling_activity presampling activity presampling activity slot presampling_activity data field