CORD-19:12f1cc78e99a0b82f3225d10abe9a5649f1b33fc / 3184-3506 4 Projects
Annnotations
| Id | Subject | Object | Predicate | Lexical cue |
|---|---|---|---|---|
| T7 | 0-322 | Epistemic_statement | denotes | Cross-sectional and longitudinal seroepidemiological studies have found large proportions of children and healthy adults to have detectable serum antibodies to the four HCoV strains, and seroconversion occurs often in childhood; seroprevalence increases with age, and reinfections may occur (5, 8, 23, 28, (36) (37) (38) . |