Dr V Ravi, former head of the Department of Neurovirology at National Institute of Mental Health & Neuro Sciences and Head, Research & Development, Tata Medical & Diagnostic Centre, Sriperumbudur, Tamil Nadu, and his team have developed the world’s first test kit, Omisure, that can detect the Omicron variant by combining S-gene target failure (SGTF) and S-gene mutation amplification (SGMA).