The COVID-19 vaccines from Pfizer-BioNTech and Moderna both require two doses. But could more lives be saved if as many people as possible received one dose first? It would mean delaying the second shot. Heather Yourex-West looks at the potential risks and rewards.
- Real-world data shows Pfizer, Moderna vaccines highly effective after just 1 shot
- Early data shows single COVID-19 shot remarkably effective: researchers
- Can delaying a second COVID-19 shot save lives? Some experts say so