We aim to make the authorities aware about re-emergence of health risks for Gurugram City, keyed to renewal of air pollution inthe post-COVID 19 times. We compute multiple Air Quality Health Indicators (AQHI)forPre-Lockdown (denoted as PreLD; pre-COVID normal life; March 5-25, 2020), COVID-19 Lockdown (LD; March 25 - May 31), Un-Lockdown (UNLD; June 1 – August 31) and Post-Lockdown (PostLD life-as-usual conditions; September 1, 2020 – January 31, 2021) using 24-hour,time-weighted average ambient PM2.5 and PM10 concentrations, obtained from the Central Pollution Control Board. Results indicated that beyond initial reductions in ambient PM2.5 and PM10 levels in the LD period, they (i) persisted above international/national regulatory thresholds all along the study period; and (ii) rapidly spiked in the PostLD period, indicating reemergence of pollution-induced health concerns. We computed a suit of AQHIs including all-cause mortality for children and infant (5-yr age); respiratory mortality for all age groups;and cardiopulmonary and cancer mortality. Relative risk factor (RR) for all the above have grown in the PostLD periods, with children and infants appearing more vulnerable than other age groups.We highlight to the authorities of short (YLL,YLD, DALY) and long-term benefits of undertaking air quality-health research. We alsoreflect onpotential sources of uncertainties, and underscored main areas for future researchto establish statistically meaningful relationships between air quality and health.