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Beijing: A third booster dose of a COVID-19 vaccine was associated with a 90 per cent reduction in death in people with multiple health conditions compared to two doses, according to a study conducted in Hong Kong.

The research, published in Canadian Medical Association Journal, compared data from people aged 18 years or older with two or more chronic conditions, such as high blood pressure, diabetes and chronic kidney



disease, who received a third dose between November 2021 and March 2022, compared to people who received only 2 doses.

"We found a substantially reduced risk of COVID-19–related death in adults with multimorbidity who received a homologous booster dose of BNT162b2, an mRNA vaccine, or CoronaVac, an inactivated whole-virus vaccine," said Esther Chan from The University of Hong Kong.



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