The coronavirus disease 2019 (COVID-19) delta wave: Refocusing effort and remaining resilient in the face of evolving infection prevention and antimicrobial stewardship challenges.

Challenges for infection prevention and antimicrobial stewardship programs have arisen with the fourth wave of the coronavirus disease 2019 (COVID-19) pandemic, fueled by the delta variant. These challenges include breakthrough infections in vaccinated individuals, decisions to re-escalate infection prevention measures, critical medication shortages, and provider burnout. Various strategies are needed to meet these challenges.