# Exposure Notification: Benefits and Challenges of Smartphone Applications to Augment Contact Tracing
> **GAO Report** · 2021-09-09 · `gao-21-104622`
## Report
- **GAO ID:** gao-21-104622
- **Type:** Report
- **Published:** 2021-09-09
## Source
- [GAO product page](https://www.gao.gov/products/gao-21-104622)
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*MORVS · CC0 1.0*