Howard Florey

Apart from the scientific interest attached to my various journeyings, it has been made clear to me that human needs and aspirations differ little the world over and that no great difficulties arise in one race dealing with another when matters of scientific importance are involved.

This year, 1996, has been designated the 'Year of the Vaccine,' commemorating the 200th anniversary of Edward Jenner's vaccination of James Phipps with cowpox virus and subsequent challenge with smallpox virus. Insight into the nature of viruses, and how viruses interact with mammalian cells, has evolved since the turn of the century.

Even though we don't always realize it, as the day goes on, we have increased difficulty exerting self-control and focusing on our work. As self-control wears out, we feel tired and find tasks to be more difficult, and our mood sours.