What about breastfeeding from the nipple vs drinking pumped breast milk? Or breastfeeding from a wet nurse vs breastfeeding from one's biological mother? Soun

What about breastfeeding from the nipple vs drinking pumped breast milk? Or breastfeeding from a wet nurse vs breastfeeding from one's biological mother? Sounds like we still know so little, but I'd be curious about these two questions as well.