Why do people go to work when they're sick? I don't understand for the life of me, how someone thinks it's ok? If you don't feel well, your company (or money) is not worth your life or the lives of others. Stay home ffs.
I've worked with people who were proud of coming into work with a hacking cough and temperature. They would take their temperature at their desk and announce it as if they were doing something amazing.
Even worse is when I've worked for managers who during your review compare you to those people saying things like you should make more effort to reduce your time off sick (even if under the average yearly sick days) or make more effort to come in when you're just feeling a "bit under the weather".
It is a terrible attitude but it is extremely common the world over sadly.
In North Dakota the governor just signed an executive order allowing Covid-positive healthcare workers to stay on job. Including nursing homes.
Another reason: don't work, no income. U.S. has no federal sick leave law. Most states don't either.