The idea is easy, but maybe still to early to implement, We need to wait for second and third wave much deadlier disease to consider implementation. PERSONAL PROTECTIVE SUIT - similar to those astronauts weary, but lightweight and simple. The protective helmet, overall and means to sterilize material often. Maybe sort of Telefon cabin to enter and spray sterilizing disinfectants onto overall before removing it. The lightweight suit can be equipped with backpack containing a battery and positive pressure air pump, filters. Such suit should provide near 100% safety for personnel at risk at first, then general public in case of a pandemic emergency.
If somebody believes in UFO or other religious superstitions - "Saints" as pictured had this transparent helmet already here on Earth years ago.