You have to sing this. Out loud. Loud.

On the twelth day of Christmas my true love sent to me:

Twelve bowels running

Eleven lines infecting

Ten kids a whooping

Nine hand hygiene dancers

Eight babes a milking

Seven stools a swimming

Six geese a sneezing

No g-o-l-d rings*

Four oozing wounds

Three copper pens

Two sterile golves

And – an – outbreak – in – a – phylogenetic – tree.

* Plain metal bands allowed.

This blog is inspired by a tweet from @IPS_Infection:

Image: HMS Beagle Blog (awaiting permission).