17) Black Death
This sign isn’t cheerful in any way, shape, or form. A disease that killed 30-50% of the population in 1348 is a large amount. Knowing that the Black Death entered England through this port makes us grateful for our current medical technology and inventions ââ(via Bored Panda). But that’s not to say that other unchecked viral threats aren’t floating around, so we need to stay vigilant overall.