CORD-19:12d35c12218f230c49f4dc892814ba9f1037f251 / 17216-17501 4 Projects
Annnotations
| Id | Subject | Object | Predicate | Lexical cue |
|---|---|---|---|---|
| TextSentencer_T79 | 0-285 | Sentence | denotes | There is substantial clinical evidence to suggest that protective T cell immunity does not last for more than a couple of years after resolution of a natural infection or vaccination, unless the response is boosted by re-exposure to the same or cross-reactive antigens (57) (58) (59) . |