9 News Australia published this video item, entitled “COVID-19 strains and vaccine efficacy explained | Coronavirus | 9 News Australia” – below is their description.
Dr explains the differences between the COVID-19 variants that have emerged since the start of the coronavirus pandemic. He discusses the Alpha, Beta, Delta and Kappa strains, and the efficacy of current vaccines against them. Subscribe and 🔔: https://bit.ly/2noaGhv | Get more breaking news at 9News.com.au: https://bit.ly/2nobVgF
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