No long - term harm occurred, but the incident has led to a thorough review of cardiac events in other influenza challenge studies. (sciencemag.org)
Five patients in the intervention group (1.4 percent) experienced serious adverse cardiac events within 24 hours of the end of the intervention period compared with none in the usual care group. (sciencedaily.com)
During the follow - up period, there were 145 heart attacks and other cardiac events in the group. (health.com)