I suppose in theory that there might be some non-sub-Saharan people that don’t have Neanderthal DNA just by chance, but it is unlikely. There are also people t

I suppose in theory that there might be some non-sub-Saharan people that don’t have Neanderthal DNA just by chance, but it is unlikely. There are also people that have far more than the average (2-3%) - for every person like your friend there are other with way more.