NHS board with health chiefs saying a new strain of coronavirus is 'more prevalent' in the area.Staff, patients and visitors in the NHS Highland facilities will be asked to wear official Fluid Resistant Surgical Masks (FRSM) instead of any other type of face covering.These masks are the common blue and white style coverings.NHS Highland workers in offices outside hospitals and care homes will also be asked to wear the masks which will be provided to people who don't have them.Rules around masks in facilities are decided by each individual health board based onThe Highlands has seen an upsurge in the deadly virus with eight Covid patients in intensive care in the area.And two deaths have recently been confirmed in Highland care homes.A.