A vaccination immunization by needle injection under the skin behind my neck of the chicken. Using Pressure 3.5 to 4 bar or 40 to 60 pounds / square inch.
A vaccine by using water injection needle under the skin at the back of the neck I vaccine of chicken by using air pressure 3.5 - 4 bar or 40 - 60 pounds. Per square inch.
A vaccine made by using water injection syringe vaccine I am under the skin on the neck of the chicks using wind pressure 3.5-4 bar or 40-60 pounds per square inch.