This is not a crazy question so shame on the poster who said that . It is safer for all to wear masks but it is difficult . We talk to our nanny and she sees we are completely social distancing and she does the same . We all only go to the grocery store wearing masks . I know some families where the nanny herself chooses to wear a mask , one family has a pregnant nanny and she wears a mask to protect herself by her own choice . It’s up to you and your nanny to discuss risks and decide .