Can my employers make me go into work when I’ve vomited?

Legally they can fire you for any reason or none.

Yes they can make you.

That was last night. How do you feel today?? If you're fine, you go into work.

I've upchucked & been sick the previous evening (food poisoning??) and felt perfectly fine the next day. If you don't go into work, there's likely to be consequences.

No. They can't physically force you to show up. They can fire you for not coming to work. You have to decide whether you have a virus that is contagious or something upset your stomach and you are actually feeling fine and can work. You may want to go to an urgent care clinic.

I just want to know, "Why is this question in the Computer section?"

You vomited yesterday. Today is another day.

Yes, they can demand that you attend work today. You can also refuse and declare that you’re still medically unfit.

Depending upon your terms of employment and your past sickness record, that could lead to you being fired.

If you have the Winter Vomiting Bug (norovirus) which lasts about 3 days then it’s vital that you do remain off work. But if you had that then you’d still be throwing up today, and if you caught that at work your employers would be well aware as many other staff and residents, as well as relatives and friends of those people, would be reporting the same symptoms because it is so highly contagious.

To put it simply: your employer doesn’t believe you’re unfit for work. If you are, go in under protest and they’ll see for themselves when you arrive looking sallow, sweaty, dehydrated, and you blow chunks over the manager’s desk and have diarrhoea dribbling down your leg when you present yourself for work.

Your employer should know better by risking the health of the elderly and sick people to allow you into work until you have a clean bill of health.