If your boss won’t let you take a sick day, vomit on their desk or bring some of your feces to work and display it as “proof”

Since they refuse to believe people get sick, vomit on them/their desk/their computer and show them your feces. Insist on staying. Vomit in plain view of customers and let them know your boss's name and that the boss insisted you stay working while vomiting! Call the health dept and show them the proof that your boss insisted you come into work with food poisoning! Put iton social media and call the local news!