He’s pretty well corrected in the comments on the thread you linked. (And good for you for that!)
It does seem that a second shot doesn’t do any good for someone who has been previously infected.
I doubt you have the education or skills to correct Dr Bhakdi.
No shot, one shot, two shots, three shots.
I choose not to be a lab rat for a flu with a 99.7% survival rate. Am I crazy?