Fig. 2
The skeleton map of three-layer strategy applied from 2015 to 2018 in Hainan. The red frame represents applied in the first layer only, but the blue frame represents various measures depend on different layers. IRS indoor residual spraying, TLS three-layer strategy, LLINs long lasting insecticide nets, JPCS joint prevention and control strategies, ACD active case detection, PCD passive case detection, MPD malaria parasite detection, VS vector surveillance, ACT attendees of capacity training, MC mass chemoprophylaxis