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Coronavirus Australia: The mystery that could explain why COVID vaccines work so well


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Examine, a weekly science newsletter written by national science reporter Liam Mannix, is sent every Tuesday. The 12th instalment is below. You can sign up to receive it from
The Agehere and from
The Sydney Morning Heraldhere.
There’s something a bit odd about COVID-19 vaccines. Good, but odd.
This painting depicts a coronavirus just entering the lungs, surrounded by mucus secreted by respiratory cells, secreted antibodies, and several small immune systems proteins. 
Credit:David Goodsell, Protein Data Bank
Now consider the huge range of different efficacy levels the vaccines have for preventing infection: from 61 to 95 per cent.
Different vaccines. Different efficacy levels. But the same protection against serious illness and death. What’s going on? ....

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