Please contact cov19.impfung@ma15.wien.gv.at (Subject: Impfschutz bei Immunsuppression or Immunisation with immunosuppression) and declare your need for a booster shot. After your case has been reviewed and we have checked back with you, you will be contacted immediately to be informed about the next steps. For a faster processing of your request, you may attach your doctor’s report or other relevant medical documents to your email.