BCG vaccine screened for active tuberculosis. BCG is also contraindicated in certain people who have IL-12 receptor pathway defects. BCG is given as a single intradermal injection at the insertion of the deltoid. If BCG is accidentally given subcutaneously, then a local abscess may form (a "BCG-oma") that can sometimes ulcerate, and may require treatment with antibiotics immediately, otherwise without treatment it could spread the infection causing severe damage to vital organs. However, it is important to note an abscess is not always associated with incorrect administration, and it is one of the more common complications that can occur with the vaccination.
BCG disease outbreak in Finland in the 2000s to a different strain. In August 2002, the BCG vaccine used in Finland was discontinued by the manufacturer after factory inspectors were dissatisfied with the manufacturing process. Finland switched to a Danish strain BCG vaccine which did not have marketing authorization in Finland. Despite lack of marketing authorization, the vaccine was offered and recommended to all Finnish newborns (ca. 55 000 - 60 000 per year), and parents were not told the vaccine had no marketing authorization as required by Finnish and European Union legislation. The vaccine was injected into the thigh of newborns, despite clear manufacturer instructions that the