COVID-19 vaccine clinic in the Coliseum on the University of Nebraska-Lincoln campus April 20, 2021. [Photo by Craig Chandler | University Communication.] Huskers who received their 1st Pfizer vaccine dose on April 20 in the Coliseum should watch for an email from the Lincoln-Lancaster Health Department with an assigned appointment for Tuesday, May 11 between 11 a.m.-1:30 p.m.