WHEN Ashley Shew turned up for an appointment at a medical centre in spring 2020, a member of staff told her she could remove her mask because only people with pre-existing conditions were vulnerable to COVID-19. Shew was surprised. “A hard-of-hearing amputee battered by chemotherapy and more”, as she describes herself, she is a regular at the centre — the appointment that day concerned her prosthetic leg. Who, she wondered, did the staff member think counted as a person with pre-existing conditions…?

This article first appeared in Nature on 16 February 2022. To continue reading, click here.