FONTENAY-AUX-ROSES, France—Nursing home worker Sandra Barona is so vehemently against receiving a COVID-19 shot that she said she may quit her job after French President Emmanuel Macron ordered all health workers to get vaccinated. Barona, who looks after elderly residents in a care home southwest of Paris, expressed scant faith in vaccines she felt had been developed too hastily, even though regulators around the world have repeatedly said speed will not compromise safety. But she said she took particular umbrage at having her individual freedoms trampled over. “We have rights in France. We live in a country which believes in freedom, equality,” she said, referring to two of the French Republic’s founding principles. Barona said Macron was discriminating between the vaccinated and unvaccinated—an issue some of Macron’s opponents say could pose legal problems for the president’s plans. Holding up the vaccine as the only path to leading a normal life, …