I have 5 viruses including HHV6, EBV, CMV etc and it is attacking my CNS. Im on Valtrex and Im taking Bovine colostrum with no problem but Im worried about transfer factor. Im taking the collostrum becuase I have low IGG and IGA and the rheumotologist suggested it to help boost my immune system. Dont know if it is becuase I am very sick with these viruses and I am only just able to stand and go to the store after 5 months of being bedridden. How many of your Doctors actually support you taking transfer factor and do ANY of you have the low IGG IGA problem?????????