PMC:7519301 / 166-292 JSONTXT

{"project":"LitCovid-PD-CLO","denotations":[{"id":"T3","span":{"begin":35,"end":36},"obj":"http://purl.obolibrary.org/obo/CLO_0001020"},{"id":"T4","span":{"begin":72,"end":77},"obj":"http://purl.obolibrary.org/obo/NCBITaxon_10239"},{"id":"T5","span":{"begin":92,"end":93},"obj":"http://purl.obolibrary.org/obo/CLO_0001020"}],"text":"questions about the possibility of a universally effective vaccine. The virus can mutate in a given individual, and these vari"}