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Covid vaccine setbacks temper optimism after upbeat news

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www.livemint.com

Vaccine makers, including two of the biggest in the world, suffered setbacks in the push to get more Covid-19 shots across the line, tempering a run of positive news.Sanofi and GlaxoSmithKline Plc delayed advanced trials of their experimental Covid-19 shot after it failed to produce a strong enough response in older people, pushing its potential availability to the end of next year.

In another blow, trials of a vaccine being developed by CSL Ltd. and the University of Queensland in Australia ran into difficulties.Sanofi and its UK partner will begin a new second-phase study with a more concentrated antigen in February after they said the current dosage failed to generate a good immune response in people 50 years and older.

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