Daisymomma breastmilk donation is far healhier than formula feeding. With that said , I do know noy everyone knows they can get donor milk or even find a donor in their area tomeet their child's constant needs, without having to pay shipping costs etc...
A lot of moms DO make sure the donor has a medical file on hand proving. What she has/soesn't have n regards to disease and immunities. I do. I have donated, wet nursed a daycare baby (mom asked me to and I felt honored to help out) , and am currently using donor milk for my son until I can re-build my own supply back after a major decrease from being too busy working to pump.