As with most pharmaceutical drugs, this has a long list of potential side effects.  GcMAF, on the other hand, is a naturally occuring protein in a healthy immune system.  Dr Bradstreet discovered that autistic children have a higher than normal level of nagalase, and this disrupts the body's ability to make GcMAF.  By reintroducing this protein, he found that 85% responded positively and some even went on to lose the label of autism as they no longer displayed autistic traits.  See his speech on it (the paper to which he refers was peer-reviewed and published this week) http://www.youtube.com/watch?v=FZ5wog0oig0 .  I fail to understand why FirstImmune GcMAF does not get more publicity.  I've met parents whose children are now verbal after starting the therapy, yet no media writes up about this.  Seeing the joy on the parents faces, this new discovery should be shouted from the rooftops.  Its making me feel that the 'conspiracy theorists' have a point, that media is owned and managed by big money including big pharma.