Scientists work on estimating COVID-19 trajectory Scientists work on estimating COVID-19 trajectory 03 May 2021 | News The scientists have stated that in the case of COVID-19, it is clear that the nature of the virus has been changing very rapidly Image credit- shutterstock.com A team of scientists from the Indian Institute of Technology- Kanpur & Hyderabad have been working on a mathermatical model called Saturated-Unsaturated Transport (SUTRA), to predict the spread of the virus. The scientists have stated that in the case of COVID-19, it is clear that the nature of the virus has been changing very rapidly. In such a context, any prediction for COVID-19 must be continually readjusted, sometimes almost daily.