AstraZeneca vaccine. What you need to know.

In the past few weeks, a small group of epidemiologists have raised questions around the effectiveness of the AstraZeneca vaccine.

A scientist at Seattle's University of Washington examines the effect of a vaccine on COVID-19 cells. Source: Photo by Karen Ducey/Getty Images

Most people in Australia are due to receive this jab this year but there have been questions about whether it’s the best option.  Why? What are the facts?

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