| Id |
Subject |
Object |
Predicate |
Lexical cue |
| T23 |
0-181 |
Sentence |
denotes |
An important caveat is that the duration of protective immunity after natural infection with SARS-CoV-2 is not currently known, and is one of the most urgent questions for research. |
| T24 |
182-320 |
Sentence |
denotes |
Antibodies have been shown to last for at least a few months [3], and T-cell responses are likely to persist for several years more [4,5]. |
| T25 |
321-522 |
Sentence |
denotes |
Nevertheless, if people can be reinfected with SARS-CoV-2 within a few years, the virus could become endemic like other seasonal respiratory viruses (e.g. influenza, respiratory syncytial virus, etc.). |
| T26 |
523-667 |
Sentence |
denotes |
In such a case, herd immunity might only be achievable through vaccination, which might have to be repeated in order to sustain immunity levels. |
