Percentage and comparison of HIV/AIDS knowledge before and after intervention by secondary school students (n = 1,468) in Wuhan, China.

Note:P1: before intervention vs after intervention in middle school students’ HIV/AIDS knowledge awareness rate;P2: before intervention vs after intervention in high school students’ HIV/AIDS knowledge awareness rate;P3: middle school vs high school before intervention about students’ HIV/AIDS knowledge awareness rate;P4: middle school vs high school after intervention about students’ HIV/AIDS knowledge awareness rate;