And that's exactly how it should be. All the efficacy tests where done using the same vaccine for both doses. We have the data on that and people can be confident when getting their 2nd jab. There's no similar wide-scale testing for mixing. If there was a shortage of your vaccine type, and you're willing to wait, that should be an option, instead of the government rushing to just get that 2nd jab into you, whatever it might be.When I had my second shot they were giving both Pfizer and Modina in the same room but they were careful to be sure you got the same as your first dose. That was back in March.