muddled about introducing more hens

there are so many vaccinations for a chicken to be fully vaccinated that a small breeder would not be able to afford to do this. Some places advertise that their birds are fully vaccinated but when questioned they are only vaccinated against 3 or 4 illnesses wheras so far I have found 22 vaccines for different illnesses and different strains of the same illness and I am sure there are more. I have some pure breeds (araucanas and sablepoots) and none of them are vaccinated.

so once my hen is fully better could she still pass on mycoplasma to a non vaccinated hen?
still muddled.com

That does not sound good, I have 4 ex-batts waiting to join my flock of 5 hybrids plus cockerel and I think they all have or have had this mycoplasma. I took 2 to the vet and paid £xxx only to be told they do not do farm animals any more so am reluctant to take them to another vet. They all eat well and I get 4 eggs a day, feathers are good, eyes bright but they sneeze alot. I was waiting until they get better to introduce the ex-batts who are very healthy and noisey if a bit short on feathers and very friendly. Should you never mix "new" birds with infected ones? Should the infected ones be put down? Sorry, but I have to ask.

when i got my first two chooks last yr, one of them came down with micro symptoms, she was treated and i waited a few weeks until she was fully recovered, then i introduced 2 new girls and everything was fine, they never showed any symptoms,  i just think you should wait unitl she has cleared completey before introducing newbies.  nickyx