No control for air pollution either, since the time series is confounded by a lockdown-induced drop[0][1] and subsequent rebound. Nitrogen dioxide from vehicles

No control for air pollution either, since the time series is confounded by a lockdown-induced drop[0][1] and subsequent rebound. Nitrogen dioxide from vehicles and factories seems to cause an increase in heart attacks within one hour.[2] [0] https://www.israelhayom.com/2020/03/22/the-bright-side-virus-lockdown-cuts-israels-air-pollution-by-30/ https://www.israelhayom.com/2020/03/22/the-bright-side-virus... [1] https://www.sciencedirect.com/science/article/pii/S1352231021004490 https://www.sciencedirect.com/science/article/pii/S135223102... [2] https://www.heart.org/en/news/2022/04/22/air-pollution-exposure-may-cause-heart-attack-within-an-hour https://www.heart.org/en/news/2022/04/22/air-pollution-expos...