A vaccinologist says the two-dose Pfizer vaccine has been shown to be about 95 percent effective and ensuring every New Zealander can get it is a very wise move.The government's has named Pfizer as it's primary Covid-19 vaccine provider.It's purchased enough doses for the whole population to receive the two doses needed to protect against the virus.Auckland University's Dr Helen Petousis-Harris is part of an independent panel giving the government scientific advice on covid vaccines.She told RNZ's Yvette McCullough she was "delighted" by the move - and isn't bothered about the government having all of its eggs in one basket.