While it never went away Covid-19 is back with a vengeance
Hospitalisations of people with Covid-19 and case numbers are soaring, pushing our health system --already struggling with other winter illnesses -- to the brink.
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The culprits are the new BA.4 and particularly BA.5 subvariants of Oh-micron.
In Australia they're dealing with a similar surge and will soon make a fourth vaccine available to anyone over the age of 30.
But the effectiveness of the original vaccines is waning and even those who have already caught the virus are being reinfected, some within a month.
Immunologist Professor Graham Le Gros talks to us about how the variants are affecting us differently.
