The BA.4 and BA.5 sub-variants of Omicron are leading to a concerning jump in infections here and around the world.
That's partly because while current vaccines are preventing death and hospitalisation, they're no longer as effective at stopping COVID-19 from spreading.
Today, US virologist Jeremy Kamil on when Omicron-specific vaccines will be ready, and which nations will get them first.
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Dr Jeremy Kamil, associate professor of microbiology and immunology, Louisiana State University Health, Shreveport, Louisiana, US