<qa>  What is the name of the condition that would render vaccination unsafe?- Have an acute or chronic medical condition that, in the opinion of the investigator, would render vaccination unsafe or would interfere with the evaluation of responses. These conditions include, but are not limited to: history of significant renal impairment dialysis and treatment for kidney disease, including diabetic and hypertensive kidney disease; subjects with diabetes mellitus, well-controlled with oral agents may enroll as long there has been no dose adjustment within the past 6 months; insulin-dependent diabetes is excluded; cardiac insufficiency, if heart failure is present New York Heart Association Functional Class III or IV; an arteriosclerotic event during the 6 months prior to enrollment e.g., history of myocardial infarction, stroke, recanalization of femoral arteries, or transient ischemic attack. 