Nothing can be return back to normal until 7 billion units of vaccines get manufactured,this is insane number and don't know how long it will take to produce such amount,but atleast a year is needed to inject medicine to the everyone in this world then only people can be set free from the fear of getting affected.
Many people are already infected with a coronavirus, and has its own immune system. Others are not afraid to get infected. At first, you need much less vaccines than 7 billion. We're not dealing with a plague.
We can discuss that vaccine that has to be invented, tested, and in the end distributed.
I already wrote above that in Russia, the vaccine has been tested on volunteers and is now being prepared for mass production.