Cumulating evidence from social science has indicated the intergenerational transmission of inequality is majorly derived from the economic imbalance. In line with this, the same thing happens in health, and emerging evidence has been documenting its transmissible property. No matter the genetic or non-genetic causes, health inequality inevitably plays its role in contributing to the underlying health-associated despoliation in life. Each individual shows an eventual health state where equality and inequality reach a time-dependent temporary condition in which the balancing point fluctuates back and forth. To promote the overall health status, it is crucial to promote and optimize the positive health characteristics to get equilibrium between positive and negative. This review discussed the underlying mechanisms of intergenerational transmission of health inequality by focusing on different types of contributors to the inequality and providing prospective insights into the potentially beneficial strategies that can optimize overall individual health.

The academic debate on the study of human and animal embryos has never stopped. Despite the great expectations of scientists, the human-animal embryo hybrid experiment costs a lot and requires high technology as the endorsement, and is highly questioned internationally. Human and animal embryo experiments are contrary to ethics, and the results of cross-species hybrid embryos are unpredictable, or cause zoonotic diseases or human catastrophe. The human and animal parts of the human "chimera" embryo will develop independently, and the DNA of the two will not be mixed. It is still far from being able to use the organs obtained from the mixed embryos of humans and animals to carry out organ transplants to save more lives.■