By Brad Brooks (Reuters) – Hospitals in at least four U.S. states have reinstated mask mandates amid a rise in cases of COVID, seasonal flu and other respiratory illness. Healthcare facilities in New York, California, Illinois and Massachusetts have made masks mandatory among patients and providers. New York City Health Commissioner Dr. Ashwin Vasan told WABC TV on Wednesday that mask mandates had resumed at all 11 of the city’s public hospitals, 30 health centers and five long-term care facilities. “What we don’t want is staffing shortages, right? When we saw the omicron wave in 2022, the big…