Yes, companies can do whatever they want. It is not mandated by the Government. Therefore, if they fire you; then you can bring a class action lawsuit against them...

Many companies will not enforce testing or the jab. Otherwise, many companies will be losing a lot of their workforce. It would cripple a company if 30% - 40% of the employees walked off their job...

The only companies and workplaces that are still mandatory are the ones receiving Government subsidies, such as the VA and other Hospitals...