I just re-read the post, and thought of another issue. The IgA 
information still stands. BUT if antibodies reduced the ability to fight 
infection, why do we give vaccines? Doctors give preformed antibodies to 
babies all the time when their mothers are Hepatitis B positive. Those 
antibodies kill the hepatitis virus, without hurting the baby otherwise. 
If these doctors would give these "gamma globulins", this completely 
negates their argument.

Also, human milk modulates the infant's immune system in ways we don't 
understand. Breastfed babies make higher levels of antibodies themselves 
when they get a vaccine (in other words, formula fed infants make lower 
levels of antibodies, their immune systems are underactive due to lack 
of trophic [growth and development promoting] factors in human milk. I 
don't see how the source of the human milk would change this.

Catherine Watson Genna, IBCLC  NYC

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