On 27 May 2021, the Sanofi laboratory announced the transition to large-scale trials of its Covid-19 vaccine. Phase III is used to evaluate the efficiency of the vaccine, which will be tested on 35 000 people in several countries, including the United States.
In a best-case scenario, Sanofi's vaccine could be marketed by the end of 2021, one year after the first Covid-19 vaccines became available.
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