The first part could be true, though again, pushing 90. When he was elected in 12 years ago, they thought he was an old man in weak health THEN, who would be a "caretaker" not expected to live many years (even by himself). As for the rest, temporal plausibility is essential to assign causality from news stories. A stroke a week after a jab is highly likely to have been caused by the jab; a stroke two or three years later, much less likely.