> If the Marek chicken virus vaccine doesn’t cure the chicken of the disease but only ‘reduces symptoms’, then why are vaccinated chickens not dying too Because symptoms, such as shortness of breath, high temperature, lesions, etc are the causes of death. A symptomless infection is not deadly. > This is looking like fear-mongering horseshit to me Not worth much how its looking to you, given that you need an explanation on the above point.