Less than two weeks after authorities in South Africa alerted the world to the appearance of the heavily mutated Omicron, key questions about the variant remain unanswered. What has become increasingly clear over the weekend is that experts believe the variant will spread quickly across the globe, and that makers of messenger RNA-based vaccines aren’t confident the current versions of their vaccines will fully protect against it.
Speaking on ABC’s This Week with George Stephanopoulos on Sunday, Moderna (ticker: MRNA) President…