jones'? anyway, that's how you let yourself woah! save 40% on hotel and ticket packages right now. not later, like right now. >>> andyg overtime online to promote frightening and false theories. donie o'sullivan talked to a mother who got pulled in, to learn about how she ultimately got pulled out. >> i thought, my gosh, we're not vaccinating our kid. she'll just die, that's all there is to it. >> reporter: you thought if your daughter took the vaccine that she might die. >> not might, just would. >> reporter: heather simpson was somewhat of an influencer, now she's changed her tune, though her husband has not. you're going to get the vaccine when you can get it? >> right. >> reporter: and you? >> probably not. i've had covid and i have antibodies. >> reporter: the cdc suggests everyone gets the vaccine. she blames herself for the information she haired online and with her husband. >> when you went online you became part of the antivac community. >> when charlotte was 15, 16 months old, i decided to make a post, thinking i was so brave about my vaccine hesitancy and my views. it got shared like 600 times. i was like,