I haven't heard about the avian leukosis virus contaminating the MMR.
One thing causing Leukemia is the aborted fetal cells in the vaccine.
I wrote about that here:
I haven't heard about the avian leukosis virus contaminating the MMR.
One thing causing Leukemia is the aborted fetal cells in the vaccine.
I wrote about that here:
RE: How the Measles Vaccination Program has Destroyed Herd Immunity