A method is provided for producing a plasmacytoid dendritic cells (pDCs), wherein hematopoietic stem and progenitor cells (HSPCs) are provided and incubated in a first medium comprising cytokines and growth factor whereby the HSPCs are differentiated into precursor-pDCs and then adding interferons (IFNs) to the first medium to obtain a second medium whereby said precursor-pDCs are differentiated into pDCs. Furthermore, a technique is provided for producing genetically modified pDCs, by initially genetically modifying HSPCs using transfection methods, including electroporation, to deliver sgRNA and Cas9 protein Moreover, a pharmaceutical formulation and a vaccine is provided which comprises pDC or genetically modified pDCs obtained according to that method.
