Depends how bad it is and what I’ve got on. Last year I got a bad cold during a really important time at work and absolutely had to go in. That was fun. But usually, no, if it’s bad then stay off work and don’t spread your germs around FFS (obviously if you have a job where you’ll lose money being off or you’ve got caring responsibilities that you can’t easily sack off then that’s very different).
Also the only thing you can do for a cold is bed rest. Guarantee if you spend one day in bed resting, then you’ll recover 3 days quicker than if you don’t.