I also read this on the BBC, which is the order I had my shots in…
the highest T cell response from AZ followed by Pfizer
Then I read this on Bloomberg about T cells and Omicron variant
T Cells Come to the Rescue as Studies Show They Buck Omicron
Then of course the article I just posted above says Moderna as your last shot provides a better immune response, so I should be in good shape. Lots of T cells and antibodies, ready to fight off omicron and other variants.