Have people forgotten during lock down stores had a couple of people in the store at a time and had good ventilation? Their tills are distanced away from each other. Ok it did get a bit daft when they had to re-stock after the shortages and staff were everywhere, but at least they could run round back and wash their hands and face. Then they were given those perspex things, and even before this they started wearing gloves and masks.
Does everyone in Nhs work only in A&E? There yes it's busy and usually nicely ventilated (unless it's broken) Every time I've been on the ward, I'm sure there were around 30 patients, all nicely spaced a metre or so away from each other. The wards also have several sinks, and hand sanitizer next to sinks, end of patient beds, near doors and some even near the elevators and spaced out randomly along long corridors. NHS deal with this type of control on a daily basis, one of the reasons for those side rooms. Oh and for a long time during this, visitors weren't allowed. And not being funny, once off a&e, you know what the patient has, and those bloods etc taken daily tell you what your patient has. Anytime someone normally gets tested for something like this, out comes gloves, masks and the plastic bin bags, think they even wear something to cover their heads (I'm usually too out of it by this point to pay close attention to details)
Now here we have a room that seat at least 30 people, who are less than 1 metre apart because the rooms weren't designed for this number. Just the growing population has increased the number of seats needed. Windows do not open. There is no ventilation unless you are thinking about a fan which isn't the same thing! There is no sink it that room, the nearest sink might be a floor down.
The store worker sink - they share with their colleagues and how many do these stores have? They are cleaned I believe every 4 hours? Depending on the store even the shop floors get cleaned a couple of times a day.
The NHS worker has their own toilets. The patients share with a small number of other patients. They are cleaned every day several times a day. Even 3am if something needs cleaner, someone appears with the proper equipment, whilst whoever continues doing their job.
The room with at least 30 people has to share the toilets with several other rooms of at least 30. Those spaces get cleaned at the end of the day unless someone has time to run around cleaning. There is no "clean up on aisle 2" option.
The store worker and the NHS is near someone for short periods of time. The room of 30 an hour a time, and then roughly every hour, one person from that room of 30 moves to another room of 30 and they do this 4 times a day. Apart from Doctors and domestics who does this on hospital wards on a daily basis? And those who do will have the things those in the room of 30 dont have.