One issue for companies could be the cost of weekly testing and record-keeping for workers who refuse to be vaccinated, which Gostin said might drive businesses to simply mandate vaccinations by “default.” While businesses largely support getting employees vaccinated, they worry a requirement could cause employees to quit at a time when many companies are facing shortages of workers, Waller said. “OSHA should be emphasizing that it will rigorously enforce the law, that it will devote high resources to inspections and enforcement, and that it will be publicizing widely that employees should blow the whistle on employers who don’t follow OSHA standards,” Gostin said.