BENGALURU: With concerns growing by the day, the Karnataka government is readying three more labs to test throat swab samples.Currently, only two labs in Bengaluru — National Institute of Virology and Virus Research and Diagnostics Laboratory (VRDL) lab attached to Bangalore Medical College and Research Institute — are categorised biosafety level 2+, a requirement for coronavirus tests.Now, the government is working on upgrading three more labs, one each in the government medical colleges at Hassan, Mysuru and Shivamogga. “The labs will be ready within one week,” the authorities said.Currently, the labs are testing only throat swab samples of suspected patients and taking 24 hours to give the results. “A patient’s blood sample will be collected only if he or she tests positive for covid-19 infection in the first throat swab sample.While earlier the state would send all samples of suspected coronavirus cases to NIV, Pune, the two labs were upgraded to biosafety level 2+ in mid-February.