Tracking and tracing will slow the spread but cannot prevent it because it is very difficult to track and trace asymptomatic cases. The very best shot we had at that, was right back at the start of all this when we knew who had left China, yet the world failed. The only thing they can do is hope to keep the infection rate to an acceptable level via a whole host of techniques of which, social distancing will remain the most important.. Ideally they need to avoid the requirement for another full lockdown once the current ones have been lifted, but I suspect that will require more stringent social distancing than they will initially attempt (for the economy’s sake), and it will therefore get away from them at least once more.
I cannot see people being allowed to rush back to nonessential flying until a vaccine comes along. Such complacency wiould almost certainly result in further lockdowns.