My hen was vaccinated for Marek's disease as a chick, but I still lost her to this illness. How could this have happened?Back to blog
Since the Marek's vaccination prevents tumors in over 90% of vaccinated chickens who are exposed to Marek's, we highly recommend getting your chicks vaccinated at hatch. Chicks should be vaccinated as soon as possible after hatching because the vaccine is not effective when given to chicks already exposed to Marek's disease.
In order to increase the effectiveness of the vaccine, keep your chicks indoors and away from all other birds until the chicks are 14 days old, at which point the vaccine will have started to take effect. Make sure you wash your hands and change clothes after handling other poultry, so that you don't infect your newly hatched chicks before they are protected by the vaccine.