There's no evidence you can spread the novel coronavirus before showing symptoms, but one study suggests it's possible for children and young people to be infectious without ever having symptoms.
A major review by UNSW researchers has identified strong evidence that a virus called Enterovirus D68 is the cause of a mystery polio-like illness that has paralysed children in the US, Canada and Europe.
Antimicrobial resistance is sometimes called an "epidemic" and some experts predict it will cause 10 million deaths by 2050, but new research puts it into perspective.
As disease prevention targets increase, needle-free technology will become increasingly attractive, write Raina MacIntyre, Daniel Salmon and Elizabeth Kpozehouen.
