Video above: Experts say flu shot very important in COVID yearYou may be discouraged after hearing that a potential COVID-19 vaccine won’t be widely distributed until 2024 or 2025, especially when some politicians have promised late 2020 or early 2021. Three or four years seems like a huge gap. What accounts for the disparity? Adar Poonawalla is CEO of the Serum Institute, the largest-by-volume maker