the fact of providing protection against something

Is there any carryover protectiveness from last year’s flu vaccine? 去年的流感疫苗是否有任何持续保护作用？

The redesign of the exercise equipment increases its protectiveness.

the feeling or quality of wanting to protect someone from criticism, hurt, danger, etc.

He has an almost obsessive protectiveness towards his home and family. 他对自己的家和家人有一种近乎强迫性的保护欲。

The lawyer is known for her fierce protectiveness of her clients.