From: Correction of vaccine effectiveness derived from test-negative case–control studies
Vaccinated | Seeking Medical Care | Total | Not Seeking Medical Care | ||
---|---|---|---|---|---|
Test + vea | Test –veb | Test + ve | Test –ve | ||
Yes | a | b | a + b | e | f |
No | c | d | c + d | g | h |
Total | a + c | b + d | n | e + g | f + h |