If my employer requires me to check my temperature at the start of every shift, can I refuse?

You can refuse. You can be fired FOR CAUSE if you refuse.

 Note: Under the orders from some states, you employer may be legally REQUIRED to insist everyone reporting to work have their temperature checked before being permitted to enter.

It IS invasive because it is a violation of your private health information which is protected . Any medical professional CANNOT share your private medical information such as your temperature with your employer without your permission. It is protected federally under HIPPA. So the company can require you to have your temperature taken as a policy and you can require than your temperature cannot be documented or shared with your employer. So you could still comply and still not allow the information to be shared....so in the end it would be no benefit to your employer.  It's not about being selfish, it's about the fact that health privacy is YOUR right to share and it cannot be compelled against your wish.

refuse and get fired. your employer  can      require testing of customers.

If you're worried about accuracy, insist on a rectal temperature.

Sure you can refuse.  He can then send you home and tell you to stay here until you agree to have it checked, or fire you on the spot.

In an at-will state, you can be fired for NO reason. So, go ahead and give them one.

Yes, the business can require testing of anyone that sets foot on their private property, as long as they don't go about it in a discriminatory way. Customers have the right to refuse and go somewhere else.

Pick your battles carefully. Having your temperature taken is not unreasonable and not invasive. They are doing it for your safety and everyone else's. In theory your employer could require testing of customers. The airlines already do it.

Yes, and you can stay home from work that day and not get paid. And if you do it often enough he can consider you to have quit.

Such a small thing to be making a big deal out of, just take your temp, no biggie.

A lot of places here are using forehead scanners