Research on mice shows that those carrying the most lice had calmer immune systems than uninfested rodents, and they [the researchers, not the mice!] said their finding may have implications for studying the causes of asthma and allergies in people.
From Reuters. The research paper. The data analysis is much better than usual. Among its strengths are: 1. Graphs of main points. 2. Transformation of variables. 3. Principal components analysis.
This study is more evidence that a high level of foreign substances in our body to which the immune system responds is beneficial. The researchers say nothing about fermented foods, which are an easy and easy-to-control way to ingest such substances. It’s hard to vary your dose of lice but easy to vary how much yogurt you eat.