Marek's vaccination and mixing vacc'd hatchery and home hatched chicks

[BlueKittyMeow]

We have 6 Marek's vaccinated hatchery chicks (3 days old) from My Pet Chicken.
We just hatched 3 of our own chicks here.

My question is - is there a risk to letting them mix, and if so, how grave a risk is it? I am planning on ordering Marek's vaccination and inoculating our home hatched chicks, but at the moment, I would like to move the new babies into the real brooder.

They are in the same room right now, with the home hatched chicks in a box outside of the brooder. Would they already be likely exposed? Can the vaccinated chicks carry Marek's?
Can you tell I am not really up on my Marek's?

ETA - actually just realized I used the hatchery chick's shipping box to transport our hatched chicks from the incubator to the brooder room. So if they were going to get anything they would already be exposed, correct?

 

[GitaBooks]

Don't worry, I doubt it will be a problem. I mix the two and haven't seen any signs of it. Chickens get marek's through dander, so if they are in the same room they likely would both have it. However, I have heard young chicks under 3 weeks won't show mareks symptoms anyways.

I hope this helps.

 

[BlueKittyMeow]

Thank you!! That makes me feel more relaxed.

Two of the four (those two hatched 12 or so hours earlier than the others) are in the main brooder with the shipped chicks now
If we have never had Marek's on our land and any outside chicks and our existing flock were vaccinated, is Marek's still something we should vaccinate for?
I understand that it is a fatal disease, but I'm not aware of how widespread it is (I'm in northern coastal Massachusetts, if it's at all more concentrated in some regions that others).

 

[GitaBooks]

Marek's is a fairly common problem, but if you keep a closed flock then it shouldn't be too much of a problem. I had a pullet with paralysis, but I don't think it was marek's (at least I hope not). Marek's vaccinations don't stop them from getting marek's, it just prevents them from getting sick from it.

I hope this helps: https://www.backyardchickens.com/a/the-great-big-giant-mareks-disease-faq

 

[Folly's place]

Mixing vaccinated and unvaccinated chicks isn't a problem UNLESS you already have Marek's disease on your property. Then your vaccinated chicks need TOTAL isolation from your environment for two or three weeks, or the vaccine will do nothing for them. Mary