You can delay the rotavirus one slightly, but it does have to be given by a certain age or it is not financed by the govt. 1st dose has to be given by 12 weeks, 2nd dose by 28 weeks and 3rd dose by 32 weeks.
actually it has nothing to really do with funding its more to do with effectiveness, as the studies show they need the less matured stomach lining to be more effective in absorption rates. well thats what i was told 12 months ago during a refresher course. this may have changed.
and also because they are unsure of adverse events in older infants as it hasn't been tested on older infants so they can't guarantee it.