# Using the IPcase Index with Inflection Points and the Corresponding Case Numbers to Identify the Impact Hit by COVID-19 in China: An Observation Study

> Research article (International Journal of Environmental Research and Public Health, 2021) · cited 32× · AI/ML

**Wikidata**: [openalex:W3130605734](https://www.wikidata.org/wiki/openalex:W3130605734)  
**Source**: https://4ort.xyz/entity/using-the-ipcase-index-with-inflection-points-and-the-corresponding-case-numbers-to-identify-the-impact-hit-by-covid-19-