Pfizer and Moderna shots, based on mRNA technology, mostly have served wealthy nations. AstraZeneca and Johnson & Johnson vaccines are expected to fill the global gap.
By Christopher Rowland, Washington Post: Business
Wed, 04/14/2021 - 3:00am
Pfizer and Moderna shots, based on mRNA technology, mostly have served wealthy nations. AstraZeneca and Johnson & Johnson vaccines are expected to fill the global gap.