Using gene editing to create humans immune to common diseases is a complex and challenging goal. Here are some potential steps and considerations: 1. **Identify target genes**: First, genes associated with common diseases need to be identified. This involves large-scale genome-wide association studies (GWAS) to find genetic variants associated with disease susceptibility. 2. **Design gene editing tools**: CRISPR-Cas9 is a commonly used gene editing technology that can be used to precisely modify DNA sequences. To create immunity, the CRISPR-Cas9 system can be designed to edit those known susceptibility genes to reduce or eliminate their disease-related functions. 3. **Verify safety and efficacy**: Test the effects of gene editing in cells and animal models to verify its safety and efficacy. Ensuring that the modifications do not cause other unforeseen health problems is critical, which requires comprehensive in vivo and in vitro testing. 4. **Ethical considerations**: Gene editing in humans involves huge ethical issues, including potential long-term effects, informed consent, and unpredictable consequences for future generations. This requires thoughtful discussion and deliberation within social and legal frameworks. 5. **Regulation and policy making**: Even if the technology matures, it is essential to formulate relevant laws and policies to regulate the application of gene editing in medicine and ensure its safety, effectiveness and fairness. 6. **Potential alternatives**: In addition to direct gene editing, other strategies to promote healthy aging and extend lifespan include gene therapy, personalized medicine, and the promotion of healthy lifestyles. Although gene editing has great potential, technical and ethical challenges need to be treated with caution. Current research tends to use gene editing to treat specific genetic diseases rather than large-scale editing to prevent and treat all common diseases.