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Professor Nathan Bartlett said a fourth shot will soon become necessary because booster immunity is waning, it's difficult to tell how vulnerable we are and it's too late for an Omicron-specific vaccine.
The UK's vaccine advisory panel said last month over-75s and vulnerable people should get the jabs six months after their original booster. But it has over than six months now with no update.
Scotland's rise in Covid cases is largely down to Stealth Omicron also known as the BA.2 sub-variant. But what is it?
A leading medical scientist says Australians may need a fourth Covid vaccination by the winter as cases start rising again in NSW and Victoria.
Daily Covid-19 infections in several Australian states witnessed a big spike on Wednesday as the new BA.2 sub-variant of Omicron is spreading rapidly in the country.The state of New South Wales (NSW) recorded 30,402 new cases on Wednesday, a ...