RTO mandates and coughing colleagues

It's been years since I've sat at a cubicle in the office. First day back was yesterday, two coworkers coughed the entire day and now I'm sick. Of course I called out, because of course I can't just telework instead because all remote and telework agreements were canceled.I totally didn't see this happening this soon....

Update: I know sick leave should be used. With working remote or teleworking most times I’d still work while sick and I know others who did the same. It just annoys me knowing that I’m physically able to do my job from home so I can cough without spreading germs or ruining someone else's anxiety. Just annoyed with the administration’s abrupt change to teleworking policies.