There has been concern and confusion over the Oxford-AstraZeneca vaccine including a small number of reports in Europe of extremely rare blood clots. There have not been any reports of blood clots in this country though Health Canada has added a warning disclaimer on the product information.
AstraZeneca said its COVID-19 vaccine was 76% effective at preventing symptomatic illness in a new analysis of its major U.S. trial — a tad lower than the level announced earlier this week in a report that was criticized for using outdated information.
U.S. health officials had publicly rebuked the drugmaker for not using the most up-to-date information when it published an interim analysis on Monday that said the vaccine was 79% effective.
Heather Yourex-West reports.
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