Coswara detects a change in virus Coswara detects a change in virus ByHemanth CSHemanth CS / Updated: Jun 14, 2021, 06:00 IST Coswara, the sound-based covid-19 diagnostic tool that the Indian Institute of Science researchers have been working on to detect the presence of the virus based on respiratory, cough and speech sounds have noted that the virus is indeed behaving differently in the second wave. This was based on samples collected from people in the exposed category (health workers) and un-exposed category, in two time periods - before March 2021 and after March 2021. As per the data collected by the team during two timelines, people who were exposed in the post-March period had scores that aligned with covid positive (meaning there were signs that they were positive) whereas the data collected from the unexposed category said that they were not affected by the virus.