Does the group health insurance taken on 25/07/2019 covers covid?

Yes. All health insurance policies including a group health insurance policy covers for COVID-19 treatment. The fundamental premise of health insurance policies should exist which means the treatment for COVID-19 should necessarily involve hospitalisation where the person was admitted in the hospital for more than 24 hrs and the test result being positive. Some health insurance policies dedicated for COVID-19 initially started offering home quarantine expenses as well.