VACCINE

“The observations of this study as well as those of similar studies
suggest that vaccine failures contributed to the genesis of the epidemic.”
Canadian Medical Association Journal • November 1975
Analysis of a measles epidemic:
possible role of vaccine failures
W. E. Rawls, M. L. Rawls, and M. A. Chernesky
Abstract
A measles epidemic occurred in the Greensville (Ont.) Unit schools during
January and February 1975. There were 47 cases of measles in 403
students: 26 (55%) of the children had a history of being vaccinated
and 18 (38%) had not been vaccinated. Among children known to have
been vaccinated at less than 1 year of age 7 of 13 contracted measles,
while among the 48 children who had not been vaccinated 18 contracted
measles. The attack rate among vaccinees increased with increasing
time since vaccination. The observations of this study as well as those
of similar studies suggest that vaccine failures contributed to the genesis
of the epidemic. It is recommended that all children initially vaccinated
at less than 1 year of age should be revaccinated with live attenuated
measles virus vaccine.
Full Report
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1956577/