Advantages of the Johnson & Johnson Vaccine 0:32
(CNN) -
The U.S. Food and Drug Administration (FDA) has authorized the emergency use of Johnson & Johnson's COVID-19 vaccine for adults 18 years of age and older.
It is the third vaccine authorized by the FDA, and the first available in the country that requires a single dose.
The vaccine, manufactured by Janssen, the vaccine arm of J&J, is safe and effective and does not require special storage, allowing for easier distribution across the country.
Johnson & Johnson's vaccine has been tested in more than 44,000 people in the US, South Africa and Latin America.
Globally, it was 66.1% effective against moderate to severe / critical COVID-19 at least four weeks after vaccination, according to an FDA analysis.
In the USA, it is considered to be 72% effective and offers 86% protection against severe forms of the disease.
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