Now living in Pepperell, Massachusetts, she works as principal scientist of toxicology for preclinical drug development at Apellis Pharmaceuticals.
![UMSL alum Toni Hayes uses her passion for science to make a difference for people with rare diseases](https://blogs.umsl.edu/news/files/2023/11/toni-hayes-818.jpg)
Now living in Pepperell, Massachusetts, she works as principal scientist of toxicology for preclinical drug development at Apellis Pharmaceuticals.
Now living in Pepperell, Massachusetts, she works as principal scientist of toxicology for preclinical drug development at Apellis Pharmaceuticals.
Now living in Pepperell, Massachusetts, she works as principal scientist of toxicology for preclinical drug development at Apellis Pharmaceuticals.
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