New Zealand defined it as the "end of community transmission". I guess, no more passing the virus from one person to another, but probably some new cases can pop up when someone with the virus comes into the country.
I believe that COVID-19 as most other respiratory infections has weather depended character. Air pollution, weather/climatic conditions, and specific geometrical structure of upper airways play a major role in the seasonality of COVID-19 and other resp infections. The threshold climatic conditions are // T>22C / RH < 80% // - these conditions determine enhanced deposition of inhaled air pollutants in the airways due to supersaturation effects (and enhanced condensational growth). I think and believe that these threshold climatic conditions define the minimal risk of COVID-19. Please find the information in :
Article Influence of weather and seasonal variations in temperature ...
and
Preprint Age- and gender-related changes in the upper airways correla...
There are 2 options for the development of events. Option 1: COVID-19 is the development of a scenario of the behavior of states in a global crisis. This is necessary to obtain the behavior skills of people and humanity as a whole. Then the pandemic will end by order of the authors of the experiment. 2nd option: COVID-19 is an unexpected and new event. The gradual ending will depend on the standard of living of people and the state of the economy.
The summary of the bloomberg article spells it out. Herd immunity with its unfortunate 'collateral damage' as no one has any immunity to this novel pathogen, and secondly, immunization, which is still a long way off. Thus, prevention is better than cure, but there is no cure, except the above, besides for all the supportive treatment provided.