Critical Care Workers Have Lower Seroprevalence of SARS-CoV-2 IgG Compared with Non-patient Facing Staff in First Wave of COVID19 oleh Baxendale Helen E., Wells David, Gronlund Jessica, Nadesalingham Angalee, Paloniemi Mina, Carnell George, Tonks Paul, Ceron-Gutierrez Lourdes, Ebrahimi Soraya, Sayer Ashleigh, Briggs John A.G., Ziong Xiaoli, Nathan James A, Grice Guinevere, James Leo C, Luptak Jakub, Pai Sumita, Heeney Jonathan L, Lear Sara, Doffinger Rainer