More companies are requiring COVID-19 vaccines and taking actions to motivate employees into getting their shots. Some may fire workers who don’t comply or charge them more for their health insurance. Employers also might limit business travel or perks like access to the company gym only to the vaccinated. Many businesses also have been offering cash, gift cards and other incentives to workers who get shots. But since Pfizer’s vaccine recently got full approval from the Food and Drug Administration, more employers have started taking a harder stance on vaccination.