It’s not just living space, expenses and child-rearing tasks that you share with your spouse or partner – it’s also likely that you have similar immune systems.
A team from the Babraham Institute in the United Kingdom and VIB and KU Leuven in Belgium examined the immune systems of 670 individuals ages 2 to 86, assessing factors such as age, gender, fitness level and, for the adults, whether they co-parented a kid or not.
Based on the results, those who lived and raised a child together had a 50 percent reduced variation in their immune
systems, compared to the much greater diversity identified in the bigger population.
It makes sense that living with a partner would significantly affect one’s body and health, given shared routines, synchronized sleep schedules and exposure to the same pathogens or pollutants. Kissing and other forms of physical contact, too, allow the exchange of both good and bad bacteria.
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