Delta variant establishes more than 6% of tested COVID-19 cases with virus variant in NYC: Health division Kumar Jeetendra | June 19, 2021 The Delta variant, first detected in India, constituted over 6 per cent of COVID-19 cases tested for virus variants in New York City, according to official data from the city’s health department. The New York City Health Department said in its recent update that out of the 105 NYC COVID-19 cases tested for variant viruses …