The company's best days as a top pandemic vaccine supplier might be over, but it still has enough potential to be compelling.It was a rock star during the coronavirus pandemic, but Pfizer (PFE 2.73%) hasn't been the most exciting company in 2024. Its stock has become something of a value play, at least according to one analyst who released a fresh research note based on meetings with company management. He feels the stock has upside potential that's comfortably in the double-digit percentages. Here's why.An ...