Head of UK Covid-19 vaccine taskforce: Slim possibility of vaccine by Christmas

The video discusses the timeline and process for distributing COVID-19 vaccines, focusing on the Oxford and Pfizer BIONTECH candidates. It highlights the need for sufficient infections in studies to statistically prove vaccine efficacy. The role of independent experts in assessing when enough data is available to unblind studies is also covered.

What are the two vaccines mentioned in the text?

What is the current status of the phase three studies for the vaccines?

What is the significance of having a sufficient number of infections in the study?

What is the main uncertainty regarding the vaccines mentioned in the text?

What do independent experts need to assess before conducting a blind study?