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Moderna COVID-19 Vaccine Shines In Clinical Trial
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A second COVID-19 vaccine now also appears highly effective in preventing illness following exposure to the virus that causes the disease.
The biotech company Moderna, Inc., said Monday that its experimental vaccine was 94.5% effective in preventing disease, according to an analysis of its clinical trial.
The news comes a week after Pfizer and BioNTech said their vaccine was more than 90% effective.
The results for both vaccines come from interim analyses of large clinical studies. In the Moderna study there were 30,000 volunteers. Half got two doses of the vaccine 28 days apart, half got two shots of a placebo on the same schedule.
There were 95 instances of COVID-19 illness among the study participants — only five of those cases were in the vaccinated group. Ninety were in the group receiving the placebo. Of these, there were 11 cases of severe disease. The results indicate the vaccine was inducing the kind of immune response that protects people if they were exposed to the coronavirus.
"This positive interim analysis from our Phase 3 study has given us the first clinical validation that our vaccine can prevent COVID-19 disease, including severe disease," said Stéphane Bancel, chief executive officer of Moderna, in a statement.

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