This is very interesting to me as I am all for boosting my immune system, but like to do this in as natural a way as possible. I am also of the opinion that the consumption of milk protein is unnatural for humans(except for breast milk for babies). I have done plenty of research on this and have come to the conclusion that it can actually cause health problems in people.
I take a vegan acidophilus every day in the form of a drink called goodbelly, take lemon water every morning and eat many types of organic fruit and vegetables daily, avoid meat, eat fish high in omega 3, avoid dairy products and generally eat healthfully.
But having read your article, I ask myself if I am doing enough?....how can I get lactoferrin in my diet, if I do not and will not consume any mammal produce? Is there a natural and vegan way to do this?
Maybe this is oxymoronic but I have to ask.