Nuisance 79- note: Saliva tests have been in use at HKG airport for months. results are available in 4 hours.
I hope the Government are considering a vaccination certificate, as I would have thought, a way to start to allow international travel more freely, would be a vaccination certificate, in the way you need one for Yellow Fever.
I can only see the start of any recovery for concerts, theatres & international travel to be available for those having a vaccine certificate. It's not ideal- but if it enables the opening up of "normal" life then so be it, until such time as better solutions come along.