Pneumonia

Measles

The first measles vaccine was inactivated, but after several years of common use, it turned out that it led to atypical measles, as well as to pneumonia and encephalopathy. The first attenuated vaccines were so potent that an immunoglobulin injection was also required with the vaccine administration. As a consequence, in 1965 and in 1967 the vaccine was attenuated again and again.

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