Won't those tissues spread more than one disease? polyvalent vaccine <grin> - much the same as 'Triple Antigen' which used to combine diphtheria, tetanus and w

Won't those tissues spread more than one disease? polyvalent vaccine <grin> - much the same as 'Triple Antigen' which used to combine diphtheria, tetanus and whooping cough vaccines. I initially laughed at this - it's definitely a money making scam - but it has a hidden basis of truth. It's certainly not a lot different really from fecal/faecal transplants.