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Rare breakthrough COVID cases raise concern
Breakthrough COVID cases rare in fully vaccinated Minnesotans
New Concerns Rising About Breakthrough Cases Of COVID-19
Breakthrough COVID-19 cases are rare and it’s better if you're vaxxed
Expert: Breakthrough COVID-19 cases are possible, but rare
What You Need To Know About Breakthrough COVID-19 Infections
Doctors say rare breakthrough COVID cases prove the vaccine is working
Health experts expressing concern of rise in COVID-19 breakthrough cases
Breakthrough COVID Cases Back in the Spotlight
Breakthrough cases rare but a reminder those vaccinated are still at risk, expert says
Doctor explains: What are breakthrough COVID cases?
Breakthrough Covid Cases Rise Across The Country | NBC News