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But RSS is still somewhat confusing for many people , and with good reason — it 's an emerging technology that 's still going through massive growing pains , even as it changes the way we consume information . Any reference can be found either by using a Key word , series of words , or a reference number , even if it shows up only once . Based on observations in experimentally infected sheep , it has been proposed that certain lymphocytes , which are part of an animal 's immune system , may be persistently infected with the virus even after it is cleared from the blood stream19 . An abdominal aortic aneurysm is a dangerous medical condition that , even after it is treated , must be monitored carefully for the rest of a patient 's life . Hasten to Jesus , even though he seems to frown , for there is more love in a frowning Savior than in all the world beside . The field retains its oppositional spirit , even as it changes intellectual direction and assumes new organizational forms .