Mc Keon, in nineteenth century studied the decline in the incidence of the infectious diseases like tuberculosis and he explained the co-relation between the declinein the incidence of infectious disease and told that the relation is better understood in terms of –
**Core Concept**
McKeown's work on the decline of infectious diseases like tuberculosis in the 19th century highlighted the relationship between improvements in living standards and reductions in infectious disease incidence. His studies emphasized the role of better nutrition, hygiene, and socioeconomic conditions in controlling infectious diseases.
**Why the Correct Answer is Right**
McKeown's hypothesis posits that improvements in living standards, particularly in nutrition, hygiene, and socioeconomic conditions, led to a decline in infectious disease incidence. He proposed that better nutrition, leading to increased resistance to infections, and improved hygiene practices, such as better waste disposal and access to clean water, contributed to the decline. Additionally, socioeconomic factors, including increased access to education and healthcare, also played a crucial role in controlling infectious diseases.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect as it does not accurately represent McKeown's hypothesis, which focused on improvements in living standards rather than solely on public health interventions or medical advancements.
**Option B:** This option is incorrect as it oversimplifies the complex relationship between socioeconomic factors and infectious disease incidence, failing to acknowledge the multifaceted nature of McKeown's hypothesis.
**Option C:** This option is incorrect as it is unrelated to McKeown's work and does not accurately represent the relationship between improvements in living standards and infectious disease incidence.
**Clinical Pearl / High-Yield Fact**
McKeown's hypothesis highlights the importance of considering the broader socioeconomic context in understanding the decline of infectious diseases, rather than solely focusing on medical or public health interventions.
**Correct Answer: D. Improvement in living standards.**