Interestingly, there is some work being done on using Sars-Covid-2 infected cattle and milk and dung as a vaccination against Covid-19. I don't know the progress though. Such a concept worked for Edward Jenner for CowPox and SmallPox originally.At least now you've all avoided the deadly Ekka variant of cow-COVID.
Our last outbreak in SA a couple of weeks ago was caused by someone who was allowed to skip quarantine in SA after Sydney quarantine. He caught it somewhere in NSW - quarantine - hospital - taxi - somewhere.So presumably SA Residents flying home from overseas via SYD would have to do 28 days quarantine. That’s rough.