17 September 2024 : Clinical Research
Influenza Hemagglutinin Antibody Levels in the Elderly: Impact of Sex, Age, and Influenza/COVID-19 Vaccination Status During the 2021/2022 Epidemic Season in Warsaw, Poland
Magdalena Proniewska-Sadowska
1ABCDEF*, Anna Poznańska 2C, Lidia Bernadeta Brydak 3ABDEFG
DOI: 10.12659/MSM.945002
Med Sci Monit 2024; 30:e945002
Table 4 Comparison of protective levels in persons vaccinated and unvaccinated against influenza according to the influenza A virus subtype and the influenza B virus lineage.
| Virus type | Number of vaccinated people | Protective level of vaccinated people | Number of unvaccinated | Protective level of unvaccinated people | Significance* (p-value) |
|---|---|---|---|---|---|
| A/Victoria/2570/2019 (H1N1)pdm09 | 78 | 43.6% | 178 | 20.2% | <0.001 |
| A/Cambodia/e0826360/2020(H3N2) | 78 | 89.7% | 178 | 86.5% | NS |
| B/Washington/B/Victoria lineage | 78 | 79.5% | 178 | 54.5% | <0.001 |
| B/Phuket/3073/2013 (B/Yamagata lineage) | 78 | 87.2% | 178 | 71.3% | 0.001 |
| * chi-square test. NS – not significant. | |||||