The timing couldn’t have been worse. In March, just as Thailand’s coronavirus outbreak began to ramp up, three hospitals in Bangkok announced that they had suspended testing for the virus because they had run out of reagents. Thai researchers rushed to help the country’s clinical laboratories meet the demand. Looking for affordable and easy-to-use tests, systems biologist Chayasith (Tao) Uttamapinant at the Vidyasirimedhi Institute of Science and Technology in Rayong reached out to an old acquaintance: CRISPR co-discoverer Feng Zhang, who had been developing an assay for the coronavirus inspired by the gene-editing technology.