Everything we do as Jews, even the seemingly mundane things like healthy eating and exercising, becomes part of something so much higher when we do things with the right intentions of serving Hashem.
Since it is neither possible nor a good idea to sanitize the world, our microcosms are our own responsibility. This has always been true. Spare yourself the unhealthy stress of worrying what others are doing. Focus on your personal efforts and thank Hashem in advance for continuing to keep you safe.