Chinese fertility doctors have tried to make HIV-proof human embryos, but the experiments ended in a bust. The new report is the second time researchers in China revealed that they had a go at making genetically modified human embryos. The controversial experiments are, in effect, feasibility studies of whether it’s possible to make super-people engineered to avoid genetic disorders or resist disease.

“It is foreseeable that a genetically modified human could be generated,” according to Yong Fan, a researcher at Guangzhou Medical University, who published the report. His team collected more than 200 one-cell embryos and attempted to alter their DNA to install a gene that protects against HIV infection. The study, published two days ago in an obscure reproductive journal, was first spotted by reporters at Nature. FULL REPORT