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SciShow
What Ventilators Taught Us About Breathing
Humans’ experiences with ventilators have taught us that sighing isn’t just a way to express yourself: it’s a vital part of our everyday breathing.
Be Smart
Why Vaccines Work
Vaccines were first used in 1796, about 100 years before viruses were even discovered. Beginning with the history of scurvy and polio, viewers see how vaccines work and how they help humans overcome and eradicate diseases.