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Data in favour of mixing COVID-19 vaccines, but long-term effects unknown: experts


Data in favour of mixing COVID-19 vaccines, but long-term effects unknown: experts
Saba Aziz
© Photo by JAVIER TORRES/AFP via Getty Images)
View of vials of the Pfizer-BioNTech vaccine against COVID-19 at a vaccination centre in Santiago, on July 12, 2021. (Photo by JAVIER TORRES / AFP) (Photo by JAVIER TORRES/AFP via Getty Images)
Canada, like several other countries, has been mixing and matching COVID-19 vaccines for weeks amid safety concerns over the AstraZeneca shot.
On Monday, the chief scientist at the World Health Organization (WHO) cautioned against that approach, calling it “a dangerous trend” for a subsequent dose as well as booster shots saying there was insufficient evidence available about the health impact. ....

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