| Study | Reason for exclusion |
|---|---|
| Chen 2020 | No comparisons |
| Eisenkraft 2018 | No comparisons |
| Menon‐Johansson 2018 | No comparisons |
| Sacks 2015 | Case study |
| Tom‐Aba 2018 | No comparisons |
| Tom‐Aba 2020 | No comparisons |
| Van Hest 2016 | Case identification rather than contact tracing |
| Voirin 2015 | No comparisons |
| White 2018 | No comparisons |
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.