Update covid_positive.md

Author: anna-stevenson

docs/curated_assets/covid_positive.md

@@ -10,7 +10,16 @@ permalink: /docs/curated_assets/covid_positive
 
 <a href="https://github.com/BHFDSC/hds_curated_assets/blob/main/curate_covid_positive.py" class="btn btn-primary fs-5 mb-4 mb-md-0 mr-2" target="_blank">View code on GitHub</a>
 
-The Covid Positive table is a consolidated table for positive COVID-19 case records derived from antigen testing, primary and secondary care data (including SGSS, Pillar 2 antigen testing, GDPPR, HES APC (diagnosis) and CHESS). Positive COVID-19 records are extracted from each dataset and records with a distinct person ID and non-null dates are retained. The tables from each extraction are then combined to create a unified dataset of all COVID-19 positive records. The final table includes six columns: person_id, date, code, description, covid_status (confirmed/suspected) and data_source. 
+The Covid Positive table is a consolidated table for positive COVID-19 case records derived from antigen testing, primary and secondary care data (including SGSS, Pillar 2 antigen testing, GDPPR, HES APC (diagnosis) and CHESS). Positive COVID-19 records are extracted from each dataset and records with a distinct person ID and non-null dates are retained. The tables from each extraction are then combined to create a unified dataset of all COVID-19 positive records. 
+
+The output table includes six columns: 
+
+- **person_id**
+- **date**
+- **code**
+- **description**
+- **covid_status** (confirmed/suspected)
+- **data_source** 
 
 {: .note }
 The methodology for curating the table is further outlined <a href="https://www.thelancet.com/journals/landig/article/PIIS2589-7500(22)00091-7/fulltext" target="_blank">in this paper</a>.