PMC:7160442 / 6601-6779
Annnotations
LitCovid-sentences
| Id | Subject | Object | Predicate | Lexical cue |
|---|---|---|---|---|
| T40 | 0-178 | Sentence | denotes | Serological studies have been started in several European countries to define population immunity and studies on the duration of immunity will need to be conducted in the future. |