" Whereas cells in men have just a single, maternal X chromosome, cells in women have both a maternal and a paternal X chromosome. Female cells inactivate one of the two X chromosomes, resulting in a mosaic of cells with distinct combinations of gene variants. This variety could result in an immunity advantage compared to the more fixed expression in males.51 "

― Nicholas A. Christakis , Apollo's Arrow: The Profound and Enduring Impact of Coronavirus on the Way We Live