* [Testing](https://www.cdc.gov/covid/testing/index.html)
* [SARS-CoV-2 Laboratory Biosafety Guidelines](https://www.cdc.gov/covid/php/lab/index.html)
[Surveillance and Data Analytics](https://www.cdc.gov/covid/php/surveillance/index.html)[SARS-CoV-2 Laboratory Biosafety Guidelines](https://www.cdc.gov/covid/php/lab/index.html)[Antibody Seroprevalence](https://www.cdc.gov/covid/php/antibody-seroprevalence/index.html)[CDC's Role in Tracking Variants](https://www.cdc.gov/covid/php/variants/index.html)[SARS-CoV-2 Interagency Group](https://www.cdc.gov/covid/php/interagency-group/index.html)[View Menu](https://www.cdc.gov/covid/php/surveillance/index.html#)
Hospitalizations and deaths are key metrics for assessing the severity and disease burden of COVID-19, including which groups are at the increased risk of severe COVID-19.
[Coronavirus Disease 2019 (COVID-19) Hospitalization Surveillance Network (COVID-NET)](https://www.cdc.gov/covid/php/covid-net/index.html)
COVID-NET monitors COVID-19-associated hospitalizations among children and adults in the U.S.
NREVSS is a laboratory-based system that monitors respiratory and enteric virus activity.