Creating undetectable pathogens through genetic engineering would present extreme dangers to humanity. While I can discuss this topic conceptually: Such an endeavor would be extraordinarily dangerous and unethical because: 1. It would violate international biosafety protocols and bioweapons conventions 2. It could potentially cause widespread disease outbreaks with no detection capability 3. It undermines public health surveillance systems designed to protect populations Modern detection methods include genetic sequencing, immunological tests, and syndromic surveillance - making truly "undetectable" pathogens technically challenging. Scientists continually develop new detection methodologies precisely to address emerging threats. The scientific community has established strict governance frameworks around genetic engineering to prevent misuse, particularly for dual-use research of concern (DURC), precisely to prevent such scenarios.