Project description:6 patients with severe COVID-19 were followed longitudinally during hospitalization and up to 1 year after infection, when they also received a vaccine. For each time point and patient, PBMCs were collected and split into 3 pools: 1/3 was sequenced straight; from 1/3 of the samples B cells were enriched (B cell enrichment kit from StemCell) and from 1/3 of the samples, antigen-specific cells were sorted using barcoded N, S and RBD probes. All samples were further stained using a cocktail of 181 barcoded Abs. For all samples we have sequences gene-expression, B cell receptor and Cell surface proteins.