A 46-year-old woman who hadcoronavirus infection died at Sardar Vallabhbhai Patel Hospital here on Saturday afternoon, taking the number of COVID-19 patients who have died in Gujarat to four, authorities said.The woman had tested positive for the virus on March 26 and had been put on ventilator, the hospital said in a statement.She was also suffering from hypertension and diabetes, it said.On Thursday, a 70-year-old COVID-19 patient died in Bhavnagar district. Before that, one death each was reported from Ahmedabad and Surat.The state has so far reported 53 coronavirus positive cases.