HCWs did not have a significantly higher risk of SCII than non-HCWs (RR 1.09, p = 0.70). In addition, neither working as a nurse (RR = 0.94, p = 0.82) nor as a doctor was significant (RR = 1.76, p = 0.13). There was also no significant difference in the risk of SCII between HCWs and controls after stratification by vaccination status, car ownership, having children, or regular use of public transport.