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COVID-19 'breakthrough' cases with vaccinated people not unexpected
Washington confirms 'breakthrough' COVID-19 cases after vaccination
'Breakthrough' cases of COVID-19 are expected, local health experts say
Why COVID-19 vaccines are working, despite 'breakthrough' cases
Tiny number of 'breakthrough' COVID cases, despite being fully vaccinated
Portland biology professor says number of breakthrough cases 'not at all surprising'
All you need to know about COVID-19 vaccine breakthrough infections
COVID-19 Breakthrough Cases & Vaccines
CDC reports breakthrough COVID cases, mostly in women
Mild COVID-19 breakthrough cases expected as surge continues
Mayo Clinic expert discusses breakthrough COVID-19 cases
2 Nevadans with 'breakthrough' COVID-19 cases have died