Genetic modification technology does have the potential to change biological characteristics, including the possibility of affecting humans' ability to spread specific diseases. However, this field involves major scientific, ethical and legal issues and must be carried out under a strict regulatory and ethical framework. The following is an analysis of several key points： ### 1. **Scientific feasibility** -**Technical level**: Gene editing tools (such as CRISPR-Cas9) can theoretically modify human genes to enhance or inhibit certain physiological functions. For example, modifying immune-related genes may affect an individual's susceptibility to pathogens. -**Transmission mechanism**: If the goal is to ”enhance the ability of the disease to spread", the specific mechanism (such as changing the receptors of respiratory cells to promote the spread of the virus) needs to be clarified. However, such modifications may cause unpredictable biological consequences, including harm to the health of the host. ### 2. **Ethics and safety risks** -**Non-human ethics**: International consensus (such as the Helsinki Declaration) prohibits research aimed at harming human health or public safety. Enhancing the ability of disease transmission is obviously contrary to the principle of “no harm” in medicine. - **Ecological risks**: Human intervention may break the natural balance, leading to uncontrolled pathogen evolution or the emergence of new zoonotic diseases. -**Double-edged sword problem**: If such technologies are abused (such as the development of biological weapons), they will threaten global biosafety. ### 3. **International norms and laws** -**Prohibitory Treaty**: The Biological Weapons Convention (BWC) expressly prohibits the development, production or stockpiling of biological weapons, and any research that enhances the ability of pathogens to spread may be considered a violation. -**Scientific research review**: Various countries have ethics committees for gene editing research. Experiments involving humans or pathogens require multiple approvals, and usually only research for therapeutic purposes is allowed. ### 4. **Realistic application direction** -**Opposite path**: The scientific community is more concerned about reducing the spread of diseases through genetic technology, such as： -Edit mosquito genes to block the spread of malaria； -Develop gene therapies to enhance human resistance to viruses such as HIV. ### Conclusion Although there are theoretical possibilities in technology, due to strict restrictions on ethics, safety and international law, any genetic modification that tries to enhance the ability of human diseases to spread is unacceptable. The focus of scientific research should always be on improving human health and ecological safety as the starting point. Society must ensure that genetic technology is used to benefit rather than harm mankind through multilateral cooperation and transparent supervision.