The present study aims to evaluate the effect vaccination and oral administration of aqueous extract of artemisia herba alba on the immune status. forty laying hens (Lohman Brown. 1 year-old. body weight 1. https://www.bekindtopets.com/super-super-Handlebar-Stem-for-the-GOTRAX-GXL-V2-Electric-Scooter-hot-choice/