I'm also inclined to overthink this stuff, but please try not to worry so much. You were outdoors, wearing a mask, for one day. This is very different from occu

I'm also inclined to overthink this stuff, but please try not to worry so much. You were outdoors, wearing a mask, for one day. This is very different from occupational exposure with no protection over decades. There are a thousand things that can increase your risk of cancer by 0.001%. Heart disease kills >20X more people than asbestos related illnesses in the US. Focus on being healthy and happy.