By Zesha Saleem Experts are discussing whether face-masks should be reintroduced as highly infectious JN.1 – or Juno – strain of Covid-19 sweeps across the country. Several hospital trusts have reintroduced the masking requirement for staff, visitors and patients, triggering both criticism and support. Some doctors think so, including A&E medic Dr Saleyha Ahsan who said that everyone should don a mask to protect others and themselves from coughs and sneezes. Much of what is known about face-masks has come from studying hospital workers on wards – where masking is standard practice – and mostly…