Luciferase, herd immunity will "ease" rates of infection down the line, but it isn't the answer.
Firstly scientists in Iceland found 40 mutations of the virus among their population alone. The UK and Italy have a more "potent" strain of the virus than other countries, so a vaccine or immunity will not have the effect it otherwise would have. Their data was passed on to the WHO but has not been widely reported for the same reasons we are kept in the dark about other things re this virus.

https://nypost.com/2020/03/24/iceland-scientists-found-40-mutations-of-the-coronavirus-report-says/

Secondly, south Korea reported on Thursday last week that 91 patients who had recovered from the virus and sent home in previous weeks/months have seen the virus "re-activate itself" in these individuals. Scientists are claiming that this is not re-infection from other people or sources, but they believe that once a patient recovers the virus lies dormant for a period and may infect that person again. So vaccines will have the same problem.

https://www.businessinsider.com/who-investigates-reports-recovered-coronavirus-patients-testing-positive-again-2020-4?r=AU&IR=T

While we among other countries are chasing a vaccine, the CSIRO is also leaps and bounds ahead of the rest of the world in sourcing an outright cure for this covid19. If successful, it would be a cure for all "SARS" based virus. That is our only hope of an end to this sh*thole virus.

Again, our government along with most other governments are keeping us in the dark about what is actually happening out there.

Some other lessons:
a) critical role of the ABC and broadcasting updates and reliable graphs;
b) Need for transparency from the word go (and not the lamentable delay in making the modelling data available as happened here);
c) base action on scientific advice and get roundtable of experts;
d) lamentable role of the Liberals in cutting funding to science and the ABC which has long term consequences, and its role in underfunding universities so that they built up reliance on international students.