PBMC specimens collected since 2010 have been subject to strict cryopreservation quality control standards, including viability and viable recovery through the NIH/DAIDS-sponsored Immunology Quality Assurance (IQA) program. PBMCs collected prior to 2010 were not subject to the same rigorous monitoring, although parts of the IQA program have been in place since 2006. If you want to only find PBMCs collected under the IQA program, be sure to indicate you only want specimens collected after 2010 below.
Peak is a network specific visit type option. If you include this option in your search criteria (without selecting other non-network-specific visit types), your search output will only feature HVTN specimen records.
Post-boost is a network specific visit type option. If you include this option in your search criteria (without selecting other non-network-specific visit types), your search output will only feature HVTN specimen records.