The UK decision to delay 2nd #COVID19 vaccine dose to 12 weeks was made by experts with decades of vaccine experience. This preprint shows high & sustained antibodies up to 10 weeks after 1 Pfizer or AZ vaccine dose in ALL adults, including elderly 💪👉https://t.co/PVzhlC2GD4 pic.twitter.com/XsQihlrgJi

— Shamez Ladhani (@ShamezLadhani) April 27, 2021