The biggest game changer will be a vaccine (a year or more away), new drugs (unlikely for a very long time), combinations of existing drugs (many have been stated as effective but none have yet been selected for mass use) ... or knowing if people are immune. Knowing the immune status is achieved by ANTIBODY testing - up to now testing is for the ANTIGEN (the virus itself) and this tells the person if he is currently infected. Testing for the antibody will tell the person if he HAS been infected (even if he was not aware as the symptoms were very mild or non-existent). I queried many times on this forum why they were not doing antibody tests but the answer was they didn't have one! Now they have. So, if people can be identified as immune (but not currently infected) then those people should (hopefully) be able to go out and return to work. No one knows currently how many that is - it could be millions in a country the size of the UK. They can return a country to nearer normality as they can work, go shopping, visiting cinemas etc. One major problem I can foresee is how to identify them as, obviously, some people not tested will say they are immune (and many people will have self-tested at home)! The pubs will re-open and be filled 'self-declared immune' who are either (i) immune (good - but not tested so they did not know), (ii) uninfected but not immune and (iii) infected. So '(iii)' will be a great danger to '(ii)'. The other problem is getting hold of the antibody test kits - let's hope all countries can get hold of kits so that we have a better understanding of the level of immunity within a population and can specifically identify those who are now immune. Btw, there have been cases of recovered individuals who showed symptoms a second time but the evidence is that they are not spreaders. IF immunity is weak or short-lived then we are back to square one.