AP File Photo/Damian Dovarganes A single-dose vial of the measles-mumps-rubella virus vaccine live, or MMR vaccine, is shown at the practice of Dr. Charles Goodman in Northridge, California, on Jan. 29. Some doctors are adamant about not accepting patients who don't believe in vaccinations, with some saying they don't want to be responsible for someone's death from an illness that was preventable. Others warn that refusing treatment to such people will just send them into the arms of quacks.