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. 2019;15(1):97-101.
doi: 10.1080/21645515.2018.1514222. Epub 2018 Oct 23.

Seasonal influenza vaccine effectiveness at primary care level, Hong Kong SAR, 2017/2018 winter

Yung-Wai Desmond Chan  1 , Miu-Ling Wong  1 , Ka-Wing Au  1 , Shuk-Kwan Chuang  1
Affiliations

Seasonal influenza vaccine effectiveness at primary care level, Hong Kong SAR, 2017/2018 winter

Yung-Wai Desmond Chan et al. Hum Vaccin Immunother. 2019.

Abstract

The 2017/18 winter influenza season in Hong Kong started in early January 2018, predominated by influenza B/Yamagata. We collaborated with private medical practitioners of our sentinel surveillance system to collect respiratory specimens and clinical information from patients with influenza-like illness for estimation of the influenza vaccine effectiveness (VE) using the test-negative case-control design. We found that the overall VE was 59.1% (95%CI 41.1 to 71.8%) against all influenza and 53.5% (95%CI 35.4 to 74.6%) against influenza B. Seasonal influenza vaccine provided moderate to good protection against laboratory-confirmed influenza infection at primary care level in Hong Kong in the 2017/18 winter influenza season.

Keywords: epidemiology; influenza; influenza vaccine; surveillance; vaccine; vaccine effectiveness.

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Figures

Figure 1.
Figure 1.
RT-PCR results of Centre for Health Protection influenza-like illness sentinel surveillance in private medical practitioners by week of specimen received, Hong Kong, Nov 2017 to Mar 2018. Note: 5 cases of non-influenza A/B cases with influenza C detection were excluded from this figure.
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References

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