The Vaccine Rollout Was a Success. But Events Within and Beyond Biden’s Control Stymied Progress.

This month, the U.S. surpassed 800,000 Covid-related deaths since the pandemic started, and the 1 million mark is in view. The reopening of Broadway shows — something viewed by many as a sign that normalcy was returning — is facing interruptions as breakthrough cases among cast members cause intermittent performance cancellations.