After how many days we can take covid 2 nd dose and side-effects as it's genearal after 84 days 2 nd dose to be taken, but what if we take 2 dose after 6 month, 1-2 years will there be any negative impact, apart from chances of corona virus. Though the effect of 1 dose decrease same after 2 nd dose its effect also decrese after some time and as we seeing in Russia and European countries people after getting 2 nd dose also getting affected again with corona virus. Can any one tell the negatives effect of not taking 2 nd dose ,apart from corona virus or its ok nothing else will happen , just vacine wise less immune to corona virus.?? Can any one help..what I don't want to take 2 nd dose of vaccine..what will be the effect health-wise?? Thanks