Thank you for your query,
As the oral typhoid vaccine
is kept outside the fridge for a few hours, its efficacy will go.
Advised temperature maintenance is important for vaccines.
So discard the vaccine and inform to your Pediatrician
go for a new well maintained dose.
And I advise you to administration of vaccine to be carried out in the clinic by a healthcare professional as to monitor for any adverse effects and their management appropriately.
Hope I have answered your query.