It will never go away,it will become a seasonal virus like flu,the population will build up immunity as we go along,remember we only have very small numbers confirmed,they just said in the briefing that we are not testing everyone so it will never be the true numbers reported,there are a lot of drugs already in use for other conditions being tested to see if they can help out whilst we are awaiting the vaccine
the bottom line i suppose is that we just have learn to live with it,it will mutate,whether that makes it stronger or weaker we will have to wait and see,there are painful times ahead in terms of deaths,relaxing lockdown is a delicate job,the numbers will spike again but we just have try and try and limit it
Edit,as chippy said there is a lot to learn about immunity and vaccination