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. 2024 Oct 30;12(11):2186. doi: 10.3390/microorganisms12112186

Figure 1.

Figure 1

The overall flow of this study (from 1 June 2021 to 31 May 2022 in Yiwu, Zhejiang province). a The definition of a survey-identified suspected pertussis case was presented in Section 2.2. b Inclusion and exclusion criteria of suspected pertussis cases in SHs were presented in Section 2.3. c All inpatient suspected pertussis cases were enrolled during the study period. d The first 5–10 outpatients with suspected pertussis each week in the SHs were enrolled during the study period. HUAS, healthcare utilization and attitudes survey; PCR, polymerase chain reaction; SHs, surveillance hospitals.