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marek's vaccine in older birds

post #1 of 2
Thread Starter 

Do anyone know if you can give the Marek's vaccine older birds? I have heard of people giving older birds marek's vac. The bottle says how to vaccine in day old chicks but, I want to see what the oldest age you can give it. 

post #2 of 2

You can vaccinate later but it may have no effect.

Every day past day old, the vaccine has less effectiveness.

The reason is that it is in a race with Marek's in the environment. It takes time for antibodies to develop and if exposed to a strain of Marek's they're susceptible to, it won't work.

NPIP 43-813

“Travel is fatal to prejudice, bigotry, and narrow-mindedness, and many of our people need it sorely on these accounts.

Broad, wholesome, charitable views of men and things cannot be acquired by vegetating in one little corner of the earth all one's lifetime.”                  Mark Twain

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NPIP 43-813

“Travel is fatal to prejudice, bigotry, and narrow-mindedness, and many of our people need it sorely on these accounts.

Broad, wholesome, charitable views of men and things cannot be acquired by vegetating in one little corner of the earth all one's lifetime.”                  Mark Twain

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