1. Ban smoking from all buildings. Because it's bad for you.
2. Ban smoking outside the hospital or anywhere in the grounds. Because it's bad for you.
3. Assue they will give up smoking during one of the most stressful times of their life.
4. Ensure already weak patients with dubious immunity have to walk as far as possible, leave the safety of the security staff and are exposed to all weathers and germ-ridden public. Because clearly, that is much better for them.