From Middle English, from Old English efen, efn, emn â(â even, equal, like, level, just, impartial, true â), from Proto-Germanic *ebnaz â(â flat, level, even; equal, straight â), from Proto-Indo-European *(hâ)emno- â(â equal, straight; flat, level, even â).
1 Puppies can receive the injectable vaccine starting at 6 to 8 weeks of age, followed by a booster between 10 and 12 weeks of age. 2  For adult dogs or puppies older than 16 weeks, the intranasal vaccine can be given once, and the injectable vaccine should be given twice, two to four weeks apart. Kittens can be vaccinated intranasally as early as 8 weeks of age. 2  Puppies can receive the injectable vaccine starting at 6 to 8 weeks of age, followed by a booster between 10 and 12 weeks of age.
Primary vaccination age* 3 months or older. Booster vaccination every 3 years. Route of administration intramuscularly or subcutaneously. * Primary vaccination may be administered at an earlier age (minimum in dogs and cats of 4 weeks of age), but then a repeat vaccination must be given at the age of 3 months.Can be used during pregnancy in dogs.oute of administration intramuscularly or subcutaneously. * Primary vaccination may be administered at an earlier age (minimum in dogs and cats of 4 weeks of age), but then a repeat vaccination must be given at the age of 3 months. Can be used during pregnancy in dogs.