2025 Yes https://doi.org/10.1371/journal.pntd.0012976 Temesgen, Minwuyelet Maru Africa Observational Epidemiology Study Students Elementary (K-5) Middle/Jr High (6-8) Parasites Other Researchers screened 300 schoolchildren (ages 7–14) in Northeast Ethiopia for S. mansoni and hepatitis B. Using stool and blood tests, they found 29.6% had schistosomiasis, while only 0.3% tested positive for hepatitis B. No co-infections were detected.