Three more Zika positive cases have been confirmed in Kerala. State Health Minister Veena George said, Kerala has intensified all preventive measures to combat the virus. 2,100 PCR kits which are designed for testing the virus has been procured from National Virology Institute in Pune. Blood tests are being conducted to confirm the virus. During initial stages, one sample may require about 8 hours of testing. Hospitals have been directed to test pregnant women and those with susceptible symptoms in a timely manner.