New Delhi, August 13Congress president Sonia Gandhi Saturday tested positive for COVID-19 again and will remain in isolation.Earlier this week, her daughter and Congress general secretary Priyanka Gandhi Vadra had also tested positive.”Congress President Smt. Sonia Gandhi has tested positive for Covid-19 today. She will remain in isolation as per Govt. protocol,” Congress general secretary Jaiam Ramesh said in a tweet Saturday.Sonia Gandhi had tested positive for COVID-19 in early June as well.Days after she had tested positive, the 75-year-old leader was admitted to Sir Ganga Ram Hospital here on June 12. She was discharged on June 20.