Probably things will not go back to normal after people are vaccinated. The bar for when to have restrictions have been lowered a lot during last year. Mutations will keep threat level
So far the mutations, while even more infectious and causing the third wave, is being covered by the vaccines. The more it spread though the more chance for further mutation.India is a scary place to watch right now for that. They have such a large population that is not taking any precautions and their healthcare system is already overloaded.