Data has been harmonized to ensure easy access for contestants and other users. More information about the experimental protocols, data processing, data standardization and data availability for the prediction challenge are available at the following links:

• investigations (details of the investigations that recruited the participants)
• participants (including participant demographics, vaccination histories, HLA typing)
• serology
• plasma cytokines
• ex-vivo spectral cytometry
• antigen-reactive T cells (AIM)
• scTCR-Seq
• RNA-Seq
• bulk BCR-Seq