THIS DAY IN SCIENCE: Earth's (In)famous Birthday (4004 BC)

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“Our bodies are bombarded by bacteria and viruses. For those that make their way inside, our immune system is on guard, waiting not only to kill the invaders but also to create memory cells that will help defeat them more quickly the next time they try to attack. Vaccines, which are weakened versions of a disease like polio or measles, rely on the memory of our immune system to combat the real danger if it eventually enters our bodies.” [PBS NOVA 2014]

This activity will show students the consequences of having a largely unvaccinated population, demonstrating why high population coverage of vaccination is important.

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