Pfizer’s Accelerator Shots and a New One, referring to the Delta Variant

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 nearly 100 countries. The companies expect to begin clinical trials of the vaccine in August. Pfizer and BioNTech also reported promising results from studies of people undergoing treatment. […]