It's too late. The genie is out of the bottle. The moment the virus escaped Wuhan there was/is no stopping it. You'll never get a coordinated world wide lockdown sufficient to stop all infection. And being a strain of flu it will likely coevolve with any vaccine we throw at it. Local strains are already showing resistance against various vaccines. There was even a covid-19 breakout amongst the Yankees team even though they were all vaccinated.