COVID-19 vaccine trials at the University of Wisconsin are among those which have been resumed.  Pharmaceutical giant Astra-Zeneca suspended the testing last month when a trial participant in the United Kingdom became since.  A review determined the test vaccine didn’t cause the illness.  The resumption of the trials was announced over the weekend.  Scientists at U-W Health and the U-W School of Medicine will begin contacting participants after getting the approval to resume the trials.