Among 11 reports concerning individuals with a prior history of chronic cardiovascular disease, 1 serious case involved a 42-year-old man with a history of uncontrolled hyperlipidemia who was hospitalized with a myocardial infarction 2 days after vaccination. He underwent cardiac catheterization. Among 10 reports from individuals with preexisting metabolic conditions (including 8 with thyroid disease), 1 (a 30-year-old man hospitalized with pneumonia 7 days after vaccination) was serious. There were no other hospitalizations. Among the remaining 15 individuals, 13 had chronic conditions (3 with chronic neurological conditions, 4 with chronic respiratory diseases, 2 with pernicious anemia, 2 with sarcoidosis, 1 with fibromyalgia, and 1 with lupus) and 2 were pregnant; none resulted in hospitalization. One report, in a 48-year-old woman who had a prior history of Bell palsy, was classified as serious.