  This report describes the aggregation and anonymization process applied to
the initial version of COVID-19 Search Trends symptoms dataset (published at
https://goo.gle/covid19symptomdataset on September 2, 2020), a publicly
available dataset that shows aggregated, anonymized trends in Google searches
for symptoms (and some related topics). The anonymization process is designed
to protect the daily symptom search activity of every user with
$\varepsilon$-differential privacy for $\varepsilon$ = 1.68.
