Alarm over patients 'mixing and matching' vax themselves

A Sydney man has revealed he's had four doses of two different vaccines - a trend the WHO says is 'dangerous'

The WHO's chief scientist is advising people not to take matters into their own hands by mixing and matching COVID-19 vaccines from different manufacturers.

Dr Soumya Swaminathan told an online briefing on Monday it was a "dangerous trend".

"It will be a chaotic situation in countries if citizens start deciding when and who will be taking a second, a third and a fourth dose," she said.

It should be public health agencies who make decisions, based on available data, and not

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