In the pipeline: What the next wave of COVID-19 vaccines could look like We take a look at some of the COVID-19 vaccine candidates moving through Phase 1 and 2 clinical trials - and how they could offer a point of difference to authorized vaccines. While vaccines from big names such as Pfizer/BioNTech, Moderna and AstraZeneca are rolling out across the world, there are currently 64 vaccines in clinical development, according to the latest figures from the World Health Organization. Phase 3 candidates from companies such as Johnson & Johnson and Curevac are well-known, but we take a look at some of the earlier-stage candidates coming through the pipeline.