Serious underlying immunological condition (e.g. immunosuppressive disease or therapy, human immunodeficiency virus (HIV) infection…). Systemic treatment with immune suppressive medication, including chronic steroid use of > 10 mg prednisone or equivalent. Anything in the opinion of the investigator that would prevent volunteers from completing the study or put the volunteer at risk.

Serious underlying immunological condition (e.g. immunosuppressive disease or therapy, human immunodeficiency virus (HIV) infection…). Systemic treatment with immune suppressive medication, including chronic steroid use of > 10 mg prednisone or equivalent. Anything in the opinion of the investigator that would prevent volunteers from completing the study or put the volunteer at risk.