We live in an ageing society, with the global median age rising steadily. Australia’s economic viability will increasingly rely on retaining older people in the workforce for longer. This, of course, relies on keeping older people healthy into old age – and immunisation can play an important role.
To understand why we fart, you need to know something about the volume of gases produced in the bowels first.
Influenza viruses that exist in nature and affect wild birds shuffle their genes about all the time, creating new viruses with different genetic combinations. In this way a virus was created that in 1918 replicated well and transmitted efficiently in humans. Known as the "Spanish flu", it was one of the deadliest pandemics in human history, killing up to 50m people worldwide.
We all worry about our health from time to time, at least to some degree, but some people worry excessively about catastrophic consequences of seemingly benign symptoms. They’re known as hypochondriacs.
The pioneering aviator Amy Johnson was incapacitated by period pain; did she have endometriosis?