CEOs and scientists on whether existing vaccines will work against Omicron

As cases of the Omicron variant continue to rise across the U.S., public health officials have one main question: Are the current vaccines from Moderna, Johnson & Johnson and Pfizer effective against the new variant?

For now, no one truly knows the answer. However, the CEOs of Moderna and Pfizer, as well as scientists from Johnson & Johnson, have all weighed in on the topic. Some say a new vaccine is inevitable, as Omicron can mutate too many different ways; others say they need more data to be sure. 

Here's a roundup of what top leaders from vaccine makers have said about their fight against Omicron.