Yet even the roughest morning-after can be cured in under an hour according to Dr Jason Burke, the founder of Hangover Heaven, a 45ft-long bus that treats the side effects of drinking too much with IV therapy.

BBC: Hangover help from a Las Vegas bus

In the emergency department she was found to have influenza and was admitted for IV fluids and oxygen therapy.

FORBES: Is This Year's Flu Vaccine Good Enough?