Inventions MCQs (Grade 8) From Textbook
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The MCQ: In which one of the following year, diphtheria vaccine was invented; "Diptheria MCQs" App Download [Free] with answers: 1924, 1913, 1976, and 1903 for online elementary school classes. Solve Inventions and Inventors Quiz Questions, download Apple Book (Free Chapter) for school certificate.
In which one of the following year, diphtheria vaccine was invented?
The first successful vaccine for diphtheria was developed by
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