PMC:7519301 / 173-269 JSONTXT

{"project":"LitCovid-PD-CLO","denotations":[{"id":"T3","span":{"begin":28,"end":29},"obj":"http://purl.obolibrary.org/obo/CLO_0001020"},{"id":"T4","span":{"begin":65,"end":70},"obj":"http://purl.obolibrary.org/obo/NCBITaxon_10239"},{"id":"T5","span":{"begin":85,"end":86},"obj":"http://purl.obolibrary.org/obo/CLO_0001020"}],"text":"ns about the possibility of a universally effective vaccine. The virus can mutate in a given ind"}