The reasons for this are poorly understood but are thought to be linked to changes in human lifestyle that have altered our exposure to the diversity of microbes. (immunology.org)
Now that I am back home in New York, I try not to insist on a particular human lifestyle or language or tradition, all of which can go rotten as they become useless or out - of - date. (redeeminggod.com)
The beginning of agriculture and animal domestication, which began in the Near East before 11,000 years ago, had a tremendous impact on human lifestyle. (sciencedaily.com)