Infectious diseases expert Professor Robert Booy explains why some people can’t catch COVID-19, even as those around them become infected. Subscribe and 🔔: http://9Soci.al/KM6e50GjSK9 | Get more breaking news at 9News.com.au: http://9Soci.al/iyCO50GjSK6 0:00 Why some can’t catch COVID-19 2:57 Canada…
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