Both the Johnson & Johnson and AstraZeneca drugs are made using modified adenoviruses that cannot replicate in the human body. And the Johnson & Johnson vaccine, crucially, is administered in a single dose. The Johnson & Johnson vaccine is now under review for emergency authorization by the FDA, with approval expected by the first week of March. ADADThe company has pledged to deliver 100 million doses to the federal government by the end of June. A Johnson & Johnson spokesman declined to comment on the letter.
Source: Washington Post February 22, 2021 12:00 UTC