Donald Trump continues his war on science and vaccines by signing an executive order breaking up the MMR vaccine into three separate shots given at different times. We want it in three separate vaccinations given at separate times together. TRUMP: So the MMR, we want to have separate, separate visits, separate times. So at year one, you should have five separate visits for vaccines rather than giving them all in the same day. The recommended vaccines have been shown to be as effective in combination as they are individually.