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. 2001 Jan 13;322(7278):82–85. doi: 10.1136/bmj.322.7278.82

Table 1.

Views of health professionals on likelihood of an association between measles, mumps, and rubella (MMR) vaccine and autism or Crohn's disease. Figures are numbers (percentage of professional group)

Association with autism
Association with Crohn's disease
Very likely or possible Unlikely Don't know Very likely or possible Unlikely Don't know
General practioners (n=158) 20 (13) 135 (85)  3 (2) 20 (13) 128 (81) 10 (6)
Health visitors (n=139) 10 (7) 120 (86)  9 (7) 15 (11) 114 (82) 10 (7)
Practice nurses (n=164)* 44 (27) 106 (65) 14 (9) 54 (33)  95 (58) 14 (9)
Total (n=461) 74 (16) 361 (78) 26 (6) 89 (19) 337 (73) 34 (7)
*

One practice nurse did not answer the question on association with Crohn's disease.