Covid vaccine and test passes to be introduced in Wales

[Bald Barry Bastad]

It's quite simple a vaccinated person is less likely to catch covid (efficacy 68% AZ, 82% Pfizer).

This makes a room (or stadium in this case) full of vaccinated people a safer space than a room of unvaccinated people. All people are less likely to have covid and less likely to catch it.

But it doesn't stop them from catching covid nor transmitting it so your still not safe.