The first reason is their size. They are very small and are very difficult to see. Special technology needed to be developed in order to observe them and their behavior and reach the conclusion that they were in fact infectious agents that could cause diseases. This wasn't possible before because the microscopes weren't as well developed.
Another is that they have a very long incubation period. This means that if you have them, a long time will pass before they start harming you which meant that many people believed them to be harmless since they couldn't track their behavior over a longer time period, also due to the lack of good technology.
"<span>The idea that people are born with rights that no government can take away" sums up the Enlightenment view of Natural Law. These laws are considered inalienable. </span>
In October 1962, American ships blocked Soviet ships carrying missiles from going into Cuba. The Soviets and Cubans agreed to take away the missiles if America promised not to attack Cuba. During the Cuban Missile Crisis, the Kennedy administration secretly agreed to remove the Jupiter missiles from Turkey in exchange for the withdrawal of all Russian nuclear weapons from Cuba. However, it is not decided if anyone "won". The USSR lost China's support over it.
If this is wrong I’m sorry but I think it’s. C
The Black Death killed 38 million people, it was a terrible illness which spread rapidly.
The Great Schism was in 1054 and the Christian church broke up into two sections, which essentially divided the Church with two popes.
I would say that trade would be "believed to travel to Europe because of this", because it would not really fit anywhere else.
Now, I'm not two sure on the last one but the Hundred Years War was where King Edward the III of England thought that he should be the king of France, so there was a very long battle between the two. I would say the Hundred Years War would be started by division of the heir to the throne of England, and France and Italy did not agree who was to be pope. Since the Hundred Years War had really nothing to do with Italy.