Research suggests immunity is mostly determined by lifestyle and environmental factors, not genes

Scientific studies consistently show that both genetic and environmental factors contribute to the human immune system's function. However, recent research emphasizes that environmental exposures, lifestyle choices, and living conditions often have a greater impact on immune variation than genetics alone. For example, studies analyzing twins and large cohorts reveal that innate and adaptive immune traits are differentially influenced, with environmental factors frequently exerting stronger effects.

Additionally, early life exposures and ongoing environmental interactions modulate immune memory and responsiveness. Although genes provide the foundational blueprint for immune function, the environment and lifestyle can significantly alter immune outcomes, sometimes overriding genetic predispositions.

Therefore, the claim that immunity is mostly determined by lifestyle and environmental factors rather than genes aligns well with current scientific understanding, though it is important to acknowledge the complex interplay between both influences.