diff --git a/queries/sparql/query-02-sars-cov-2-prot.yaml b/queries/sparql/query-02-sars-cov-2-prot.yaml
index 2902336b..3da02caf 100644
--- a/queries/sparql/query-02-sars-cov-2-prot.yaml
+++ b/queries/sparql/query-02-sars-cov-2-prot.yaml
@@ -9,9 +9,15 @@ query: >
   prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#>
   prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
   prefix bl: <https://w3id.org/biolink/vocab/>
+  prefix ex: <https://www.example.org/UNKNOWN/>
   SELECT ?protein ?p ?v WHERE
-  {
-  ?protein bl:category bl:Protein; <https://www.example.org/UNKNOWN/ncbi_taxid> ?ncbitaxonid;
-   ?p ?v .
-   FILTER(?ncbitaxonid="2697049")
-  }
+    {
+    ?protein bl:category bl:Protein;
+             ex:ncbi_taxid ?ncbitaxonid;
+             ?p ?v .
+     FILTER NOT EXISTS {
+      ?v bl:category bl:Publication .
+      ?v ex:provided_by ?scibitecord
+      . FILTER(?scibitecord="SciBite-CORD-19")}
+     FILTER(?ncbitaxonid="2697049")
+    }