Vaccinations

[Kelly Miller]

If you are just talking about the Marek's vaccine and not other vaccines and your flock doesn't have Marek's, then no, the new members would not catch it... the Marek's vaccine is made from a killed turkey strain of the Marek's virus, it is different from the strains that chickens can get infected with and is safe... *however*, if your flock was ever exposed to any of the chicken strains of Marek's and are now carriers (the vaccine can mask whether exposure has ever happened) then the new members can definitely be affected if any of the existing flock actively shed the virus...

I do recommend going to the link @orrpeople posted though, and talk with the amazing members there...
For other vaccines, it is highly recommended to not mix vaccinated with unvaccinated, though... just fyi... it all depends on which vaccines you are dealing with...

 

[Kelly Miller]

Thank you very much. I was asking especially due to the fact that next spring we will be either letting some go broody and hatch their own or incubation. Was wondering about vaccinations for the new babies.

 

[lazy gardener]

What Ravyn said. The Marek's vaccine will mask any Marek's dz. in the vaccinated birds. For this reason (among others) I choose not to ever vaccinate my birds.

 

[rjohns39]

What Ravyn said. The Marek's vaccine will mask any Marek's dz. in the vaccinated birds. For this reason (among others) I choose not to ever vaccinate my birds.

X2

 

[lazy gardener]

Articles/news clips that you might want to read:

http://phenomena.nationalgeographic...s-enhance-spread-of-deadlier-chicken-viruses/

https://www.pbs.org/newshour/science/tthis-chicken-vaccine-makes-virus-dangerous

 

[OneMountainAcres]

Welcome to BYC! Glad you've joined us!