Sanofi and GlaxoSmithKline Delay Plans for a Trial After Experimental Vaccine Fails in Some Older Patients.

December 11, 2020

(New York Times) – The pharmaceutical companies Sanofi and GlaxoSmithKline said Friday that their experimental Covid-19 vaccine did not appear to work well in older adults, a significant setback to their late-stage clinical trial that was previously expected to begin in the United States in December. Instead, the companies said they planned to test a modified version of their vaccine in a smaller trial beginning in February. Rather than compare their candidate with a placebo, they said, it could be tested against a vaccine expected to be authorized by regulators for emergency use soon.