This is more of a biometric topic than a forensic topic, although I’m certain that it has forensic implications.
COVID-19 has awakened a renewed interest in contactless biometric readers, most notably cameras that capture facial images. As Mike is well aware, one vendor offers contactless FINGERPRINT readers also. (There used to be two such vendors, but the other went out of business.)
But if you’re going to proceed with a contact fingerprint reader, you can take steps to keep your users safe (as long as you don’t make inflated claims about your reader’s capabilities).
After Integrated Biometrics added antimicrobial capabilities to its readers, I delved into the topic in this blog post.