Emotions and behaviours may circulate through social networks in patterns similar to what’s seen in epidemiological models of the flu virus. Every positive person you let into your life increases your chances of being positive 11 percent, estimated a study published in 2010 in the Proceedings of the Royal Society.
“Just one sad friend was needed to double an individual’s chance of becoming unhappy,” Wired summarised about the report.
Figuring out whom to avoid and whom to let in won’t always be easy. But with a little practice, you can get really good at staying far away from people who might bring your business down.