(Photo: Justin Tallis / AFP)
Johnson & Johnson stated Wednesday a second dose of its Covid-19 vaccine boosted immunity past the primary dose.
In two scientific research that haven’t but been peer-reviewed, the extra shot evoked a nine-fold improve in antibodies to the coronavirus, the company stated in a information launch.
President Joe Biden’s administration has introduced plans for all Americans vaccinated with mRNA vaccines – Pfizer and Moderna – to obtain a 3rd dose eight months after the second within the collection.
The Centers for Disease Control and Prevention (CDC) has stated it expects a second dose of the J&J vaccine shall be required, however that it wants extra information earlier than making a agency suggestion. Wednesday’s announcement will probably assist inform that technique.
The company’s information launch didn’t specify when the second dose was taken, however details about the trials on authorities web sites exhibits the company was testing a number of intervals, starting at six months.
The information comes after the CDC introduced the effectiveness of Covid-19 vaccines total have fallen after the hyper-contagious Delta variant turned dominant.
In an ongoing examine of US well being employees who had been overwhelmingly vaccinated with the Pfizer and Moderna pictures, effectiveness in opposition to all varieties of an infection fell from 91 p.c previous to Delta to 66 p.c.
But protection in opposition to extreme Covid-19 and deaths has remained extra steady, exceeding 90 p.c in response to most research
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