New York Mayor Eric Adams has made an unusual request to shopkeepers in these Covid-19 times - ban customers who won't remove their masks.
The former cop turned mayor says thieves are using face coverings as a way to hide their identity.
While not an official rule, some legal experts believe forcing those immunocompromised to drop their masks might break the law.
Matthew Cortland is a lawyer who specialises in disability and healthcare.
He spoke to Corin Dann.
