I fly my Cardinal RG, largely only solo since the COVID pandemic started. However, I also fly CAP C-182's and C-172's for mission crew training, and we follow the CAP guidance on flying with masks and sanitizing the aircraft before and after flights. As the overall US rates of positive COVID tests have gone up dramatically in the last month, has there been any increase in getting a positive COVID test result that can be traced to sharing a cockpit with another pilot? A CFI I know who teaches at a university flight school has seen a large number of his students and some of the other CFI's having to quarantine due to COVID exposure, although not specifically attributed to their time in the cockpit. I was wondering if others had seen positive COVID diagnoses that could be attributed to sharing cockpits with others.