Saina Nehwal and H S Prannoy, who had recently recovered from COVID-19, have again tested positive for the dreaded disease here ahead of the Thailand Open which began on Tuesday.The duo, along with the Indian team, was looking to participate in the Asia leg events comprising the Thailand Open (January 12-17), TOYOTA Thailand Open (January 19-24) and the HSBC BWF World Tour Finals 2020 (January 27-31).Also Read | How plant meat is coming of age in India"Saina and Prannoy tested positive for COVID-19 during a test conducted on Monday.