Depends what you mean by "little". At the start of the year, if not the end of 2020, there were studies showing the prevailing effectiveness with delays on the

Depends what you mean by "little". At the start of the year, if not the end of 2020, there were studies showing the prevailing effectiveness with delays on the second shot so it was pretty clear where the trend was. And then, merely hours ago, they decided because of the Indian variant they'd instead change the recommendation from 12 weeks to 8. So, at least in my opinion, it's a bit of a random walk down statistics street.