Please do NOT attend this trial:  (a) if you were exposed to Covid-19 within 10 days preceding the trial and do not have a confirmed negative result from testing done after the exposure. (b) if you have COVID-19 or it’s symptoms at the time of the trial. (c) if you feel ill in any way during the trials, please contact the Trial Secretary if you wish to request a full refund for any runs not yet completed due to Covid-19. At the time of the trial please go to: https://www.pa.gov/guides/responding-to-covid-19/#Travel  to see a guide that will be kept up to date as Pennsylvania resources and information change.