The COVID-19 positivity rate in Goa has now come down to 19 per cent as against 51 per cent a month back, according to the state government. However, the Goa government has not let its guard down and is making all efforts to curb the spread of the virus by emphasising on vaccination, Dr Shivanand Bandekar, head of the state's expert committee on COVID-19, told PTI on Monday. He also said that till last week, the coastal state reported a total of 12 cases of mucormycosis, and since then there has been no fresh case of the black fungus infection. As per the data of Goa health department, the state reported 20 per cent COVID-19 positivity rate on Monday as compared to 51 per cent on April 30.