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New Zealander Dr Gary McLean is a Professor in molecular immunology at London Metropolitan University and a researcher with Imperial College. He's an international authority on coronaviruses.
Professor McLean is with us to look at whether vaccinated and unvaccinated people have the same potential to infect people if they catch Covid, the decline of Pfzier's effectiveness and the need for boosters, and if nasal steroid sprays used for allergies or asthma can protect people from severe Covid-19 symptoms.
Gary McLean Photo: Supplied