Covid News: Pfizer and BioNTech Are Developing a Vaccine That Targets Delta Variant
Here’s what you need to know: Medical staff prepare a dose of the Pfizer BioNTech vaccine in Sant Vicenc de Casteller, north of Barcelona, this month.Credit…Albert Gea/Reuters Pfizer and BioNTech announced on Thursday that they are developing a version of the coronavirus vaccine that targets Delta, a highly contagious variant that has spread to 98 countries. … Read more