Child mortality following standard, medium or high titre measles immunization in West Africa. 1996, Knudsen, Int J Epidemiol

Mortality between vaccinated and non-vaccinated against measles has never been compared. However, several clinical trials in Guinea-Bissau, Senegal and Gambia compared mortality associated with different measles vaccines, and found that in girls who were given high-titre vaccines, it was 86% higher than in girls who received a medium-titre vaccine.
WHO has recommended the use of the high-titre vaccine since 1989, and who knows how many girls the vaccine has killed. It is also unknown whether the mortality rate would have been further reduced if a low-titre vaccine had been used instead of a medium-titre vaccine, or if children had not been vaccinated against measles at all.

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