Hmmm...'Health.....professionals do lie and put children at risk intentionally'?? Really? intentionally? That would be a parallel universe, one that exists only in the imagination.
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Starlight, I feel for your dilemma, but make life easier for yourself and dismiss any imaginings about parallel universes. These vaccines are safe and most states in America won't let children start school without them. If the States ( arguably the most litiginous in the world) can impose that, then you can be assured that the most rigorous research has been done into efficacy/safety. This applies to the other most developed nations in the world including, Australia, New Zealand, Scandinavia and Japan (where, incidentally, they had a big increase in Measles when they introduced the separate vaccines which then dropped when they re-introduced the MMR.
As to separate vaccines, these are often unlicensed, imported from other countries, not bound by the regulations we rely on for our other medicines and many have been recalled as they have been found to be ineffective, ie, not containing enough of the vaccine or they have been attentuated by other diluent products that have been added. This happened a couple of years ago locally, with MMR and all the children who had had separate jabs then had to be recalled to get the proper vaccines.
Anyway, enough finger-wagging... I'm sure you are only trying to do the best fro your dc but make sure any decision you take is supported by the most robust research/evidence about safety and efficacy. Good Luck!