This article originally appeared in the Huffington Post. It’s a fuller life when we have other people in it. It’s a healthier and longer one, too. Have you ever noticed how much better you feel when you have other people around you? Well, you do. Some studies suggest that thanks to their social nature, extroverts build stronger immune systems that are more equipped to fight off infection – likely due to their increased exposure to others’ germs – which means they literally feel better because of their interactions. If it starts with a stronger immune system, in what other ways can our lives be better or healthier simply by building relationships with others? We partnered with the Huffington Post on this infographic that looks at the health rewards of companionship – and shows what we sacrifice when we isolate ourselves from other people.