Pandemic smallpox was responsible for 300–500 million deaths. As recently as the early 1950s, an estimated 50 million cases of smallpox occurred in the world each year. After successful vaccination campaigns throughout the 19th and 20th centuries, the WHO certified the eradication of smallpox in December 1979. To this day, smallpox is the only human infectious disease to have been completely eradicated, and one of two infectious viruses ever to be eradicated. Historically, measles was prevalent throughout the world, as it is highly contagious. According to the U.S. National Immunization Program, 90% of people were infected with measles by age 15.
The Legacy of Heorot dying to reach when there are other grendels to kill. The colony is saved. A year later, the grendels are being driven to extinction. Now that the grendel life cycle is known, the colonists continue the hunts, but this time the samlon are targeted as well. The new tactics, supercharger spraying and recorded grendel challenges, make them almost a routine chore. The terrestrial fish are gone, and will not be reintroduced, forcing the grendels to drive their own species into extinction. Soon the grendel threat will be eradicated. Now rebuilding can begin, and this time, the colonists will not be