Anyone who challenges the prevailing orthodoxy finds himself silenced with surprising effectiveness. (George Orwell)

[Anyone challenging the Allopathic medical monopoly is silenced. See The Cancer Conspiracy for this over 100 year old game, the history of cancer is littered with MDs who have fled the country (Gerson, Burton) or been persecuted into silence, along with all other forms of doctoring and medicine, and the causes of most diseases (See: Suppress alternatives).  In 1925 they tried to silence smallpox heretic Dr Hadwen by charging him with manslaughter, which shows you the nature of this beast.
    With MMR autism it can be seen in the persecution of Dr Wakefield, Dr Jane Donegan  and Blakemore-Brown.  Which makes sure no one else will step out of line. 
    This racket has run and run because they own the media, but is being exposed recently with the internet, and the other monopolies play their part--the Intelligence and Political ones mostly.  Their greatest weapon in the past, and still now, is the fact people don't want to believe we have a nasty medical monopoly, and all that that realisation entails.]

Persecuted doctors

[1925 Dr Hadwen]  "Dare Doctor's Think?"  Verbatim Report of the Great Meeting held at Queen's Hall, London, Fri, Feb 6, 1925.  In connection with the Rex versus Hadwen manslaughter charge

or intimidate the experts into silence:

Dr. Derek Smith. A neurologist and assistant professor at Harvard Medical School, Smith had been retained to testify for people with transverse myelitis, a potentially paralyzing neurological disorder. Smith said he was "highly confident" that the tetanus vaccine could trigger the ailment in certain vulnerable individuals. Officials with the Vaccine Injury Compensation Program strongly disagreed.  Then Smith quit.  According to court papers and interviews, Smith decided to bail out  after complaints were lodged with his superiors by three other experts with a long history of testifying for the government in vaccine court.....Early in 2002, Smith was informed (that he)  "was ruining his reputation by his testimony  in the vaccine program," ...Wary of antagonizing people who could affect his career, Smith decided to drop out after testifying in one last case, .....Smith was told  in so many words that he was jeopardizing his access to research funding. [Media, 29 Nov 2004] Witnesses for Petitioners Are Often Tough to Find

Another time, Justice Department lawyers persuaded an expert to switch sides, helping them defeat a string of claims. The cases involved children who suffered seizures and brain damage after diphtheria-pertussis-tetanus, or DPT, vaccinations. But the children also had a congenital condition - tuberous sclerosis, or TS - that could trigger seizures by itself. The issue was whether the shot or only TS was to blame. 
    Petitioners won a couple of these cases in the early 1990s, thanks to testimony by Dr. Manuel Gomez of the Mayo Clinic, described in court rulings as "the world's expert in TS."
    Facing at least two dozen similar claims, the government mounted an aggressive counterattack. It retained three experts who then published three medical journal articles that supported the government's stand, according to program records.
    And without the knowledge of petitioners, government attorneys also contacted Gomez, briefed him on the work of their other experts and retained him as a defense expert.
    Gomez was "the guru of tuberous sclerosis," said Robert Moxley, a  Wyoming lawyer for petitioners. His defection "was completely pivotal." Like Chin-Caplan, Moxley described the government's actions as witness tampering.
    In September 1997, Special Master Laura Millman issued a lengthy ruling in the government's favor - basically finding that TS, not the vaccine, is usually responsible when TS infants suffer seizures. Gomez, Millman noted, had believed otherwise, "but in light of his more thorough education in the literature (courtesy of respondent) he has changed his mind."
    Her ruling led to the defeat of most TS claims. [Media, 29 Nov 2004] Witnesses for Petitioners Are Often Tough to Find