Free flu vaccines available at your local Kroger? No thanks. 
Discussion
They will shred your immune system and then offer a solution. Look out for the announcement.
To forgive and forget
We definitely can forgive if someone asks but if they do not ask and continue to harm then here is what Jesus has to say regarding harming children...
Mat 18:6 KJV But whoso shall offend one of these little ones which believe in me, it were better for him that a millstone were hanged about his neck, and that he were drowned in the depth of the sea.
Shared using AndBible: Bible Study. (https://andbible.github.io)
As far as harming others by their carelessness they know what they are doing.