“…Generally, the estimate of prevalence was 0.836, which means that about 83.6% of participants had a good score regarding knowledge of needle-stick injury and possible HIV transmission. However, the estimated prevalence of dental student's knowledge was 0.942, which mean that about 94.2% of dental students had a better knowledge than dentists, with 65.8% of knowledge score [7,19,22,23,25,31,33]. To evaluate the knowledge of HIV transmission by saliva in dental students and dentists, we included five studies, which showed various results (Table 3).…”