American Psychological Association (APA) http://www.apa.org/research/action/immune.aspx state of mind can affect your physical health immune system Studies Stress http://www.apa.org/research/action/immune.aspx Stress APA your chances of getting sick go up social isolation weakens immunity American Psychological Association http://www.apa.org/research/action/immune.aspx http://www.apa.org/research/action/immune.aspx stress depresses the immune system research highly functional immune system http://www.apa.org/research/action/immune.aspx American Psychological Association apa.org Studies http://www.apa.org/research/action/immune.aspx puts stress on your immune system http://www.apa.org/research/action/immune.aspx found http://www.apa.org/research/action/immune.aspx http://www.apa.org/research/action/immune.aspx Studies www.apa.org/research/action/immune.aspx causes http://www.apa.org/research/action/immune.aspx Studies Studies chronic stress of medical students immune response http://www.apa.org/research/action/immune.aspx reducing stress immune http://www.apa.org/research/action/immune.aspx http://www.apa.org/research/action/immune.aspx immune consequences http://www.apa.org/research/action/immune.aspx Stress can weaken your immune system. http://www.apa.org/research/action/immune.aspx more vulnerable Stress weakens the immune system Research http://www.apa.org/research/action/immune.aspx http://www.apa.org/research/action/immune.aspx http://www.apa.org/research/action/immune.aspx social isolation weakens immunity Studies výzkum http://www.apa.org/research/action/immune.aspx Weakened immunity http://www.apa.org/research/action/immune.aspx http://www.apa.org/research/action/immune.aspx weaken the immune system APA immune system http://www.apa.org/research/action/immune.aspx relationship your immune system doesn't operate http://www.apa.org/research/action/immune.aspx Studies Studies http://www.apa.org/research/action/immune.aspx http://www.apa.org/research/action/immune.aspx weakened http://www.apa.org/research/action/immune.aspx Studies http://www.apa.org/research/action/immune.aspx