Tag: COVID-19 variants
Why are there so many new Omicron sub-variants, like BA.4 and BA.5? Will I be reinfected? Is the virus mutating faster?
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By now, many of us will be familiar with the Omicron variant of SARS-CoV-2, the virus that causes COVID. This variant of concern has changed...
Here’s why you might need a 4th COVID vaccine dose this winter
Image: Achmad Ibrahim/AP/AAP
When I began drafting this article, COVID cases in Australia were coming down and the situation was stabilising.
New research released in February...
How contagious is Delta? How long are you infectious? Is it more deadly? A quick guide to the latest science
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Delta was recognised as a SARS-CoV-2 variant of concern in May 2021 and has proved extremely difficult to control in unvaccinated populations.
Delta has managed to out-compete other variants,...
Could Britain be sued for reopening and putting the world at risk from new COVID variants?
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With most COVID-19 restrictions now lifted in England, the world is watching to see what this so-called “freedom day” will bring.
Some scepticism is warranted,...
What’s the Delta COVID variant found in Melbourne? Is it more infectious and does it spread more in kids? A virologist explains
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Victoria’s current COVID outbreak took another turn last week when a new variant was discovered by health authorities. It’s not clear whether this...
Why the COVID-19 variants are so dangerous and how to stop them spreading
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With new, more infectious variants of COVID-19 detected around the world, and at New Zealand’s border, the risk of further level 3 or 4...