For vaccination of healthy chickens, as an aid in the preventing Infectious bronchitis and Newcastle disease (B1 strain)

Distribute the vaccine solution. Provide no other drinking water until all the vaccine treated water has been consumed. Provide enough watering space so that at least twothirds of the total chicken flocks can drink at one time. Add powdered skim milk by 0.3~0.5% as a demulcent to enhance the vaccination effect. Do not use any sterilizer, detergent, sanitizers and all medication form drinking water, preferably 72 hours before vaccination and 24 hours following vaccination. Give the bird no water for at least two hours prior to vaccination. Dilute 1,000 doses of vaccine with natural cold water as per the followings.

Age	7 days old	14 days old	28 days old	More than 2 month
Layer	6L	6L	22L	40L
Broller	11L	16L	36L	-