The good news is that the third wave of Covid-19 infections seems to be ebbing. On the whole, Hong Kong has done a spectacular job. And it did so under some very tough conditions: its world-famous urban density, and its proximity to Wuhan, where the pandemic first broke out.And considering that Covid-19 hit Hong Kong as it was experiencing continuing social unrest, with anger and frustration played out on its streets on a weekly, if not daily, basis, it did a phenomenal job. Hongkongers’…