Seven days after being bitten there was clearly nothing wrong with your child so I am at a loss to understand why you would then have vaccinations. His condition is in response to the vaccinations.
Should never have let her have junk in the first place. You will just have to be tough - eat your tea or you don't get anything else and stick to it (now why do I know that you won't). You need to find meals, that include vegetables, that she likes.