Before the novel coronavirus, the world was focused on another killer respiratory virus: influenza.The flu kills hundreds of thousands of people globally each year. The Covid-19 pandemic hit the U.S. after flu cases had peaked. But with the next flu season only a couple of months away, doctors are worried that a flu epidemic on top of a Covid pandemic could stretch medical resources to the breaking point. Jason Gale reports that countries like Australia and New Zealand can be a model for dealing with the flu.

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