Who among us is not confused by the sheer volume of news and information about Covid-19 and the vaccines meant to halt the pandemic? There are deliberate anti-vaccine lies, such as rumours spread in Asian communities that the injections contain animal products. But the biggest difficulty is knowing what is scientifically true.

This week, it emerged that a preliminary study in SA had found that the Oxford-AstraZeneca vaccine failed to stop mild to moderate infections from a viral variant there, and scientists in Australia called for a pause in the jab’s rollout. Meanwhile, the World Health Organization approved its use in all adults, including over-65s, saying the study was “no reason” to shun it...

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