Collective immunity
免疫───immune;集体───collective
Our immune systems are killing billions of germs right now.───我们的免疫系统正在杀死数以十亿计的细菌。
His immune system completely broke down and he became very ill.───他的免疫系统彻底崩溃了，他已病入膏肓。
Adults are often immune to German measles.───成人往往对风疹有免疫力。
Echinacea has been used for centuries to help support strong immune systems.───紫锥花几个世纪以来一直用于支持强有力的免疫系统。
So it would seem that this virus would still be able to grow and damage immune cells in his body.───所以，它们仍然有可能在体内发展并感染他身体中的免疫细胞。
It was her own immune system, attacking the joint in her body and crippling her so badly that she often had to use a wheelchair.───就是她自己的免疫系统，攻击她体内的关节，严重削弱她的行为能力，使她必须经常借助轮椅。
I am immune from the disease(sentencedict.com), for I had it once.
I'm immune to smallpox as a result of vaccination.
Our business is far from immune to economic conditions.
Once we've had the disease, we're immune for life.
Few men are immune to her charms.