Supported by the following organizations
This is to certify that Joanna Roney successfully completed and received a passing grade in PredictionX: John Snow and the Cholera Outbreak of 1854 a course of study offered by HarvardX, an online learning initiative of Harvard University.
Noted by
Alyssa Goodman
Robert Wheeler Willson Professor of Applied Astronomy Harvard University
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- Verified Certificate Issued May 3, 2026
- Valid Certificate ID 256c259671854e629c0eb395f9284817