Part of the answer, discovered in 2015, is that queen bees vaccinate their eggs by transferring into them, before they are laid, fragments of proteins from diseasecausing pathogens.

2015年给出的部分答案是，蜂王在产卵前将致病病原体的蛋白质片段转移到卵中，从而为卵接种疫苗。