People who had looked at the pictures of people sneezing, coughing, or otherwise showing signs of disease had a stronger immune response than people who had looked at pictures of men aiming guns at them. This kind of response to the sight of diseased people may have been evolutionarily adaptive, according to Schaller and his colleagues. Although an aggressive immune response has infection-fighting benefits, it's also costly - it consumes energy and can be temporarily debilitating. It may have been adaptive for the immune system to react especially aggressively when additional information indicates that the threat of infection appears high. According to Schaller, "The things we see around us, such as the sight of sick people, can provide that kind of information. And it makes sense for the immune system to respond to it. colon cleanse can helps restore healthy immune