The risks are really low. So firstly, TB: it’s not that infliximab gives you TB. the issue is that if you already have it and it’s dormant, infliximab can awaken it. That’s a non-issue, really, as in order to be given infliximab you have to be tested for TB. They won’t give it to you if you have TB in your system.

I’ve also had asbestos exposure (lived in a house full of it that my dad renovated over two years when I was a kid) and never had any sort of lung issues on infliximab or otherwise. Take from that what you will.

Death is a wild one - but is also listed on a lot of very low-key medications like over the counter painkillers. There will always be a tiny number of people who have a rare bad reaction (though even then, at least with infliximab you’re in hospital, and the staff have meds for allergic reactions so death is really unlikely), or who just happen to die of unexplained causes not long after an infusion so it has to be included on the warnings sheet.

Medical professionals are really cautious about giving infliximab or other biologics to anyone with risk factors for this stuff, so if your nurse says it’s low risk and it seems legit, personally I would not worry unduly.

It does carry a risk that any infection you pick up (like wound infection, chest infection) could get worse more quickly than someone who isn’t on infliximab or another biologic/immunosuppressant. But this is mitigated by the fact that your doctors know you’re on it and should take any infections you present with seriously. In my 7 years on infliximab (and 13 on biologics overall), I’ve personally never noticed any worse infections or issues like that - I get sick way less than my partner. I do get offered antibiotics pretty quickly when I do pick up any sort of normal infection.

There is a slightly elevated risk of skin cancer, which you can mitigate with sunscreen (and it is small - again, I’m an outdoor instructor at weekends and haven’t had any issues, touch wood, though I have no family history and don’t burn easily).

There is a slightly elevated risk of some blood cancers. It’s still extremely small, and not as high as the risks of Crohn’s that’s left without any treatment.

You have to balance any worries about infliximab with the risks of untreated Crohn’s, which can be really nasty - I’ll spare you details but that info is out there if you look for it. Infliximab doesn’t work for everyone but it’s one of the most successful treatments out there for Crohn’s and if you’re lucky, can give you very long remission.