Is working night shifts bad for you?

A new study claims that working nights can disrupt gene activity after only three days – and the health dangers are thought to include an increased risk of breast cancer, type 2 diabetes and heart attacks. Does it worry nocturnal workers? And are there any advantages?

Should I call in sick?

Luisa Dillner: When you're sick you're contagious and you won't be as productive at work as usual