With the support of the Department of Science and Technology (DST), researchers are developing an aptamer-based affordable diagnostic kit that will differentiate various types of coronavirus infection, a statement said on Friday. The Birla Institute of Technology, Mesra, Ranchi, with the support of the Science and Engineering Research Board, a body under the DST, has initiated a research with the detection of a target protein using bioinformatics tool against which the diagnostic kit has to be developed.