Under field conditions passive immunity is transferred during lay for 43 weeks after the last vaccination of broiler breeders , resulting in a duration of passive immunity in broilers of at least 14 days after hatching .
The above sentence is very complicated. Please provide me a simplified synonymous version consisting of multiple sentences:
Under field conditions , passive immunity is transmitted during the laying period , up to 43 weeks after the last vaccination of broiler breeders . The passive immunity transmitted to the chicks lasts for at least 14 days after hatching .