Calm before the storm.
Fewer people getting pissed on a night out.
Fewer kids damaging themselves in PE.
Fewer cars = fewer road accidents.
Fewer twats who think A&E = a easy way to get seen sooner than the GP.
Fewer post-minor surgery complications.
Fewer I'm waiting for a hospital appointment but I'm in too much pain/I hope I'll be able to skip the waiting list visits.
Fewer I'm not sure, but just in case visits.
Fewer work related injuries.
Less weekend sport/football/rugby/MAMIL activity.
The weather hasn't been too bad = fewer slips, trips and falls.
And, the main one - the design of newer A&E departments. They separate waiting areas in such a way that you do not see everything that's going on. The last time we were in A&E, we were in the urgent/serious section, which was noisy and so crowded on a Tuesday night that people were sitting on the floor and staff were running up and down. Children's (which we had to walk past) was fairly busy. But the waiting room was quiet. We came via ambulance, not the waiting room and it was packed.
By cancelling clinics, surgery, non urgent procedures and tests, they've freed up a lot in time for a surge, rather than still trying to handle everything until they're overrun with the desperately sick.