Did you find this answer helpful? Subscribe to keep up with all things Lifelong Learning.
There is a mechanism of transmission that is called “fomite”, which basically is through the touching of a contaminated surface and then touching your own mucous membranes (eyes, mouth, etc.) to transfer the virus for an infection. Most scientists believe this is a very minor mode of transmission of Covid, as the airborne route is the major mode of transmission. The virus does not survive for very long times on dry surfaces, such as the mirror. The blowing of air across the mirror would not generate infected particles unless you suggest that the mirror’s surface is very dusty and the dust particles could have been grossly contaminated and could become lofted into the air with a strong air current. This is not likely. I would simply suggest a wipe-down of the mirror with gentle soap and water, which would also clean the mirror to a nice shine, and then declare your new addition to your home safe!