John Kerry's wife upgraded to fair condition July 8, 2013 -- Updated 1923 GMT (0323 HKT) Teresa Heinz Kerry with husband John Kerry NEW: Teresa Heinz Kerry's condition upgraded from critical to fair, spokesman said Heinz Kerry's symptoms "consistent with some sort of seizure," source says John Kerry accompanied his wife in ambulance to hospital, spokesman said (CNN) -- Teresa Heinz Kerry, wife of Secretary of State John Kerry, has been upgraded from critical to fair condition a day after she was hospitalized with symptoms "consistent with some kind of seizure." Heinz Kerry, 74, underwent tests at Boston's Massachusetts General Hospital on Sunday night and Monday morning, Kerry spokesman Glen Johnson said, before her condition was upgraded. A source close to the family has told CNN she exhibited symptoms "consistent with some sort of seizure." Johnson said John Kerry, Heinz Kerry's son and other family members have been at the hospital since she fell ill. Heinz Kerry, 74, became ill Sunday and was taken by ambulance to Nantucket Cottage Hospital, accompanied by her husband, Johnson said. Once her condition was stabilized, she was transferred to Massachusetts General.