In order to answer that, you need to tell us if getting measles from a wild virus is safer than getting it from a vaccine. Do show your work by posting the title, journal, date and main author of the peer reviewed papers that support your statement that vaccines are not necessary.
Remember that measles tends to cause severe affects from deafness, paralysis, blindness and even death in one out of a thousand cases. So make sure your evidence is quite solid. It also spreads quite easily and quickly, which is why it returns so fast. That is why one kid can infect so many in San Diego, CA... and why it went from almost extinct to endemic in the UK shortly after the media got a hold of Wakefield's error filled press release (his Lancet paper did not show a relationship between any MMR and autism, he just lied in the press conference).