Covid 19 coronavirus: Busted - Three myths about the Pfizer-BioNTech vaccine 9 Mar, 2021 03:11 AM 6 minutes to read New Zealand has secured an extra 8.5 million does of Pfizer's Covid vaccine - enough for every New Zealander, the Government says. New Zealand has secured an extra 8.5 million does of Pfizer's Covid vaccine - enough for every New Zealander, the Government says. The Pfizer-BioNTech Covid-19 shot we're all most likely to receive this year is a product of the medical revolution that is mRNA vaccines. What does it do? And more importantly, what doesn't it do? Science reporter Jamie Morton dispels three big worries. It doesn't change our genes