1
The studies were conducted in areas heterogeneous in terms of industrial activities.
2
Most studies of asymptomatic infection have been conducted in areas of endemic visceral leishmaniasis.
3
However, only a few studies have been conducted in areas with moderate PM2.5 concentrations.
4
Methods: Two cross-sectional surveys were conducted in areas of active transmission in the Surat Thani province of Thailand in January and May 2019.