COVID-19: Study shows one shot of Pfizer or Moderna is two-thirds effective and protects well againsTony LamJun 12, 20211 min readJune 10 2021https://vancouversun.com/health/covid-19-bccdc-study-shows-one-shot-of-pfizer-or-moderna-is-two-thirds-effective-and-protects-well-against-variants
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