Pfizer and Moderna might be the biggest names in the vaccine game so far, but with more than 50 vaccine candidates in trials around the world, several other shots are on the verge of being approved in the United States. From mRNA to adenoviruses, to how efficient each vaccine appears to be against the extra contagious South African mutant strain, here’s what you need to know about the five biggest players.
1. The Pfizer vaccine
Development: Authorized for emergency use and available to the public as of Dec. 11, 2020
Effectiveness: 95 percent
Estimated effectiveness against the South African strain: “Slightly