As the weather turns colder, you can count on one thing: Organisations with a health expert to hand will publish a press release offering tips on how to avoid catching a cold or flu in the coming months. I spotted the first of the season on Physorg.com today announcing the anti-disease advice of Pamela Aaltonen at Purdue Uni’s School of Nursing. There’ll be an epidemic of them by the end of October, mark my words.