Population beyond New York City reported symptoms of post-traumatic stress 8 weeks after the attacks. This study shows that the psychological ramifications of a traumatic event are not limited to those that experience it directly, and that health implications can be felt years following the event if suitable treatment is not available to those who find themselves at greatest risk.. 9/11 stress increases risk of heart problems Fear and Tension in the aftermath of the 9/11 terrorist attacks could be making Americans sicker, according to a groundbreaking new research by UC Irvine researchers.This potential study, which is backed by the NICHD/NIH and the Pennsylvania Medical center Foundation, has been performed within the University of Pennsylvania Health System. PENN Medicine is definitely a $3.5 billion business focused on the related missions of medical education, biomedical research, and excellence in patient care. PENN Medicine includes the University of Pennsylvania School of Medicine and the University of Pennsylvania Wellness System. Penn’s College of Medicine is rated #2 in the country for receipt of NIH research funds; and ranked #3 in the country in U.S. Information & World Report’s most recent ranking of top research-oriented medical institutions.