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Advertisement Pfizer, the global biotech behind the first COVID-19 vaccine approved in Australia, swung to a small profit in the fourth quarter as it started shipping doses globally. The drugmaker expects roughly $US15 billion ($19.7 billion) in revenue this year from the vaccine, which won emergency clearance in mid-December from US regulators and already has racked up approvals in more than 50 countries. The two-dose vaccine is about 95 per cent effective at preventing coronavirus symptoms and is one of only a few vaccines available to check the global pandemic. Pfizer CEO Albert Bourla sai...

Jan 28, 2021 10:52am One infectious disease specialist said efforts to determine if existing vaccines will work against new COVID strains have left us "in a state of ignorance" due to incomplete data.(Bill Oxford/Getty Images) Just as the U.S. government is starting to ramp up purchases of Pfizer’s and Moderna’s mRNA vaccines to prevent COVID-19, a troubling question is emerging in the scientific community: Can these shots protect people against aggressive new variants racing through the U.K., South Africa and Brazil? Several analysts have scoured the medical literature and interviewed in...