Do These Words From Moderna's President Mean Trouble for Vaccine Makers?

One of the biggest topics these days among coronavirus investors is vaccine efficacy. Especially against variants. The delta variant has gained ground across the globe and become dominant in the U.S. And even though more than 54% of the U.S. population is fully vaccinated, delta continues to spread -- and cause breakthrough cases in vaccinated individuals.

In fact, the president of vaccine maker Moderna (NASDAQ: MRNA) recently made a comment about how the variant is changing the vaccine landscape. Do these words from Moderna president Stephen Hoge signal difficult times ahead for vaccine makers? 

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Source Fool.com