According to the recent reports , an estimated 4 core people in the country have yet to take the first dose of Covid vaccine. With such a large number of un-vaccinated people in the country, it is surprising that these persons have not been affected even after the mutating viruses of the earlier Covid -19 wreaked havoc, bringing about the second and third waves, with an alarming rise in the number of Covid cases, even after the second dose. This raises questions about the efficacy of these vaccines and whether it becomes necessary to take the preventive (booster) dose, which is currently being encouraged and administered free of cost. Probably it is the herd immunity that is now taking effect by bringing back life to normal and saving the un-vaccinated from being infected. Who is there to clarify?
