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Mass. doctor on COVID-19 booster shots, new variants
Mass. doctor on benefits of new COVID-19 booster shot
Mass. doc on need for COVID-19 booster shots
Mass. doctor on new COVID-19 booster shots
Video: Mass General doctor explains why COVID-19 booster shots are needed
Mass. doctor answers your questions about new COVID-19 booster shot
Mass. doctor talks about COVID-19 booster shots
Video: Boston doctor discusses effectiveness of COVID-19 vaccine booster shots
Mass. doctor on COVID-19 booster shots
Doctor on COVID-19 variants' potential spread, impact on vaccines
WHO’s Science in 5 on COVID-19: Vaccines, variants and mass gatherings - 16 April 2021
Mass. doctor on COVID-19 vaccinations, delta variant
