according to a preprint study released thursday by oxford university researchers , covid-19 is up to 10 times more likely to cause a rare brain blood clot than current available vaccines. the study, which hasn’t been peer reviewed, also suggests the vaccines carry a statistically similar risk of blood clotting — four in one million for pfizer-biontech and moderna, a finding pfizer disputes, and five in a million for astrazeneca.
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the blood clot-scare risks setting vaccination campaigns back. public confidence in the vaccine is plummeting in france, germany and spain, and there are growing anecdotal reports of people in canada refusing the vaccine, despite repeated pleas from leaders to “take the first shot offered.” demand for the shots is fizzling in montreal while thousands of appointment slots remained open this week at vaccination sites in edmonton and calgary.
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