"Nature wants you dead. Not just you, but your children and everyone you have ever met and everyone they have ever met; in fact, everyone. It wants you to cough and sneeze and poop yourself into an early grave. It wants your blood vessels to burst and pustules to explode all over your body. And - until recently - it was really good at doing this. Covid-19 may be only the first of many modern pandemics. The subject of infection and how to fight it...