Ok, where to start, Friday after thanksgiving is the 27th, I was tested on the 4th I believe, one week after exposure. I started experiencing symptoms that were similar to what she was showing when we worked together. Second, I didn't state how long I had been wearing it or what type it is, just that its a factor that needs to be taken into consideration when pumping statistics.third- negative airflow means the air is moving into the room, not like a normal room. Its then sucked out of the room through the vents, but this does not diminish the risk entirely. Fourth, most people in labs have multiple degrees its actually incredibly common. Fifth, side by side does increase the danger, I am indeed a lucky girl! Did you seriously just ask if we were peeing on each other....just Jesus. The urine bench is set up with a chemistry side and a digital microscope, we stand side by side to view microscopic images of cellular components found in the urine. She had her mask off when looking through the bright field microscopes, the fog the lenses. The math is pulled straight from statistics about the efficacy of masks. This has been shown to be around 1.5% risk of covid + persons to non infected when incontact while both masked, covid+ unmasked and other person in a mask such as surgical can be up to 70% infectious rate. Thanks for your input, but as stated im a lucky girl, im super glad I didn't get infected. This goes to show how well masks work, and that even in close proximity to a covid+ coworker for many hours I came out ok. I hope you find this conclusion to be satisfactory, I dont want to go back and forth. Wear a mask, dont wear a mask and take a gamble, its up to you. Im tired of dealing with people who want to argue them into the ground. Its pointless.