My wife, granddaughter and I went to a garden centre during half term, our first venture out anywhere, except for essential shopping, since the first lockdown. We wore masks at all times except when we went into the cafe for lunch. The following day I came down with Noro, and my wife, granddaughter and daughter all got it over the next few days. Luckily, we had it one at a time, not simultaneously.
Still, I consider this as quite lucky, as we were all better by the time I went into hospital for my bypass. I'd have been really pissed off if I'd missed my slot because of Noro.
In hospital, patients were allowed not to wear a masks while on the wards, but were always asked to wear one if being moved around between departments, e.g. from the ward to the operating theatre, or to x-ray. Staff had to wear masks at all times. Visiting on the cardiac unit was limited to one designated person, who had to book an appointment to be allowed in, and had to wear a mask at all times. My wife came in to see me just once during my 7 day stay. The following day, all visiting was stopped as someone who'd been on the ward a couple of weeks earlier had then tested positive. I was tested when I initially arrived for my treatment, again immediately before I went to theatre, and a couple more times during my stay.
I'm now pretty much self-isolating for six weeks, except for GP or hospital check ups, as this is the minimum time before I can drive again, but as the infection rate is going up I have no intention of going anywhere without wearing a mask for the foreseeable future.