Allergic reactions. Not to inj into blood vessel or skin. Not to be used for treatment of tetanus or diphtheria infection. May reduce immune response to vaccines w/ immunosuppressive therapies including irradiation, antimetabolites, alkylating agents, cytotoxic drugs & corticosteroids. Immunisation of asymptomatic & symptomatic HIV patients. Patients on anticoagulant therapy. Review patient's history of possible sensitivity & any previous adverse reactions to vaccine or similar vaccines, previous immunization history & current health status. Remain under observation for not <30 min for possible occurrence of immediate or early allergic reactions.