 I want life to be normal again. Some scientists believe that we will have the masks for many months/years.

 Why? the vaccines are very effective. Most of the people who are in danger are people who are unhealthy or are old. Since these people will be first to be vaccinated and be protected, why should we wear masks? I mean, if everything goes well, in the summer of 2021 60-70% of the population of my country will be vaccinated. almost, the vulnerable people will be protected as well as some healthy "young" ones.

 Why keep the mask? everyone will be protected.