Even when we're not having an epidemic, pertussis is always there, it's always circulating, which means that people are always at risk for pertussis, and particularly, we're concerned about young infants, who have the most severe disease.

James Watt

James Watt (30 January 1736 (19 January 1736 OS) – 25 August 1819) was a Scottish inventor, mechanical engineer, and chemist who improved on Thomas Newcomen's 1712 Newcomen steam engine with his Watt steam engine in 1781, which was fundamental to the changes brought by the Industrial Revolution in both his native Great Britain and the rest of the world.

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