The Johnson & Johnson vaccine could be a 'game changer.' But the rollout comes with some risks.

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Mar 01, 2021 The Johnson & Johnson vaccine could be a 'game changer.' But the rollout comes with some risks. Having two vaccines is good. But three is better — and experts say Johnson & Johnson's newly authorized vaccine could make a major difference in getting the pandemic under control. The third vaccine option, however, raises important questions about who should get which vaccine and why. Read More Get the NBC News Mobile App Follow NBC News Check out all of NBCNEWS Newsletters here. Update Preferences | Unsubscribe | Contact | Privacy Update Preferences Unsubscribe Contact Privacy