As regulators race to approve Pfizer/BioNTech shot, some other vaccine candidates fall by the wayside

Sydney, Australia (CNN)

​As regulators around the world race to approve the Pfizer/BioNTech coronavirus vaccine, several other vaccine candidates have been ditched or delayed.

On Friday, British and French pharmaceutical giants GlaxoSmithKline and Sanofi Pasteur said the release of their vaccine would be pushed to late next year, while one of Australia's four vaccine candidates was axed after trial participants returned false positive test results for HIV.
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The announcements could present a potential setback in the global effort to gain control of the pandemic, given that experts believe that multiple vaccine options will be required to do so. But there could be a silver lining in stopping a trial, or deciding to move slower in another, as the pace of vaccine development has contributed to concerns in some populations.

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