He said: "No one had told me about it until I was being nosy! I said, 'I really want to do it', and was super excited."
The schoolboy admitted the most thrilling bit of having the jab was getting to try out his signature on the consent forms.
He added: "I just thought that it would be nice to do my bit for science....I'm not that interested in science but I definitely am interested in doing my part."
Mum Laura Wood, 42, is particularly proud that Bertie can list the ingredients in the vaccine.
Laura, who works in digital marketing, said: "I was talking about it [the trial] to my husband and Bertie heard it and said, 'I want to do that'.