Next target for Covid vaccine: 200 crore; How soon?

India hit a milestone of administering 100 crore (1 billion) vaccination doses against Covid-19 on October 21. While it is indeed a great achievement, India has a long way to go before we meet the government-set target of administering two doses of vaccines each to 100 crore people by the year end. The challenges are many: only 30% of that target population has been covered so far. Our vaccine supplies have so far been centered on two brands Covishield and Covaxin. Our weekly rate of vaccinations has been hugely fluctuating. The vaccine distribution has been population centric, not infection centric. Also there is no clarity on when the younger ones, children below 18, will begin to get vaccines.