To determine transmission potential of influenza A(H7N9) virus, we used symptom onset data to compare 2 waves of infection in China during 2013-2014. We found evidence of increased transmission potential in the second wave and showed that live bird market closure was significantly less effective in Guangdong than in other regions.
- Disease Outbreaks
- Influenza A Virus, H7N9 Subtype
- Influenza in Birds
- Influenza, Human
- Spatio-Temporal Analysis