• The coronavirus outbreak began in Wuhan, China, in December 2019.
• Known as SARS-CoV-2, the virus has resulted in more than 174 million infections and more than 3.7 million deaths.
• SARS-CoV-2 infection causes COVID-19.
• COVID-19 has now been reported on every continent.
• Keep up to date with the latest research and information about COVID-19 here.
• For vaccine information, visit our live vaccine updates article.

A new analysis found that COVID-19 mRNA vaccines reduce the risk of a SARS-CoV-2 infection by 91% after two doses and by 81% after one dose. The results are based on data from 3,975 participants who received either the Pfizer-BioNTech or Moderna mRNA vaccine.

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