Husband won't stop vaping

When my hubby was in college, his friends all vaped and got him into it. He's been addicted to it ever since. I'm pregnant now and he refuses to stop vaping in the house. It wouldn't be so bad if it weren't so stinky and thick hanging around in the air but every time he vaped it makes me sick. I'll ask him to stop after one hit and he'll just keep doing it until he's done. By then it's all hazy in our apartment. I'm so sick of it. I asked him if he plans to vape around the baby when it gets here and he says he will because he seems to think it isn't harmful. I want to hide his vape from him because I don't know what else to do. It's driving me absolutely crazy.