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Laura Spinney is a science journalist and author. Her most recent book is Pale Rider: The Spanish Flu of 1918 and How it Changed the World (2017).
The risk of a deadly resurgence of coronavirus could change the way we live for years to come.
Thanks to fast action from the government, much of everyday life continues in Singapore. Schools, universities, shops and restaurants remain open and most public institutions are still functioning.
Having tried to avoid panic, the international body now believes that complacency is the bigger danger.
After the 1918 flu outbreak killed 50 million, nations created new organisations to fight infection. But in an age of pandemics and renewed great power rivalry, they are no longer enough.