As the World Health Organisation declares Omicron a new COVID-19 “variant of concern”, the US, Japan and the UK have halted international travel from several African nations, amid concerns over the efficacy of current vaccines. Subscribe and 🔔: http://9Soci.al/KM6e50GjSK9 | Get more breaking news at 9News.com.au: http://9Soci.al/iyCO50GjSK6
0:00 WHO names newly discovered coronavirus variant Omicron
3:27 Why is Omicron a concern?
8:22 mRNA vaccines and new COVID-19 strains
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