first time know about vaccine, people ready to take of virus from their life. when the vaccine ready, people already get used to the situation, and like what you said before. its mean people dont care about virus, they just go around, break the rules, and live a life like no virus anymore
And that is the reason why we are getting so many new cases among the fully vaccinated. Vaccines have a very low efficacy rate against the delta variant. There is a good chance of getting infected even if you have received two doses of the vaccine. So it is best to carry on with all the precautions and social distancing protocols even after receiving two doses of the vaccine. The danger is not over yet and no one should be fooled by a false sense of security, even if they have received two doses of the vaccine. BTW, the third booster dose is already in the pipeline.