I think that's the standard interpretation (i.e., human interaction is the lifesaver). However, when you start to drill down on the whole (gut) bacteria thing, I think things change. Sure, emotions also have impact on the immune system, but so do bacteria. Love IS a powerful emotion. As bacteria are as well ;) The irony (?) is gut bacteria have also been linked to mental conditions / emotions.
I love you...because your gut told my gut to say that? :)
I love you...because your gut told my gut to say that? :)