I am 63 years old working in Shanghai, China where the air quality is poor (100-400 AQi in
the winter, but hit a record over 800 once in
December). I have only started wearing a respirator outdoors in the past two weeks, but plan to wear it any day the AQI is high (most days!). I have never been a smoker or heavy drinker. I am 5'6", 155 lbs. My blood pressure has not been more than slightly high until a couple of months ago after I spent a week in Beijing (December 7-13).