WHO warns against mixing, matching Covid vaccines; calls it a ‘dangerous trend’


The World Health Organization‘s chief scientist on Monday suggested in opposition to folks mixing and matching Covid-19 vaccines from completely different producers, calling it a “harmful development” since extra information is required in regards to the well being impression.

“It is a bit of little bit of a harmful development right here,” Soumya Swaminathan informed a web-based briefing. “It will likely be a chaotic scenario in nations if residents begin deciding when and who will probably be taking a second, a 3rd and a fourth dose.”

Swaminathan referred to as mixing a “data-free zone” on Monday however the WHO clarified on Tuesday that some information was out there and extra was anticipated.

Its Strategic Advisory Group of Consultants on vaccines in June mentioned the Pfizer vaccine may very well be used as a second dose after an preliminary dose of AstraZeneca, if the latter will not be out there.

The outcomes of an extra medical trial led by the College of Oxford that may have a look at mixing AstraZeneca and Pfizer in addition to Moderna and Novovax vaccines is underway.

“Information from combine and match research of various vaccines are awaited – immunogenicity and security each must be evaluated,” the WHO mentioned in emailed feedback.

It ought to be public well being businesses who make choices, primarily based on out there information, and never people, the WHO added.

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