# Covid-19: PHE upgrades PPE advice for all patient contacts with risk of infection

> Research article (BMJ, 2020) · cited 30× · AI/ML

**Wikidata**: [openalex:W3014934974](https://www.wikidata.org/wiki/openalex:W3014934974)  
**Source**: https://4ort.xyz/entity/covid-19-phe-upgrades-ppe-advice-for-all-patient-contacts-with-risk-of-infection