maybe have a ncie suprise ready for him and say if your a big brave boy there is a suprise.

some drs will even organise thsi with you so u can drop it off the day before and organise the dr to give it to hime once he has had his injection..

it is similar to teh tooth fairy and rewarding the loss of teeth and transition into a new stage of childhood.

i have seen many mums do this and it has worked for 70-90 % of them