Moderna vaccine in final testing phase this month

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US biotech company Moderna announced Tuesday that it will enter the final phase of human trials for its Covid-19 vaccine on July 27, to test how well it protects people in the real world.

The announcement came after the results of an earlier trial to prove that the vaccine was safe and that the production of triggered antibodies had been published.

The next phase 3 trial will recruit 30,000 participants in the United States, half of whom will receive the vaccine at 100 microgram doses and the other half of whom will receive a placebo.

The researchers will then follow them over two years to determine if they are protected against infection by the virus. Or, if they become infected, if the vaccine prevents symptoms from developing.

If they experience symptoms, the vaccine can still be considered successful if it stops severe cases of Covid-19.

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