There is a study in the UK on mixing and matching the vaccines.
Here is some very high level infomation. They started the study last month, so it is very new.
https://www.theguardian.com/society/2021/apr/14/uk-study-on-mixing-covid-vaccines-between-jabs-to-be-expanded
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James
The pessimist complains about the wind; the optimist expects it to change; the engineer adjusts the sails.- William Arthur Ward (1921-1994)
Red-beard for President, 2020
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