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.
Crops, Farmers, Livestock or are you talking about modern day?
Answer:
they asked for a lot of help and fought
The legislative branch is two houses. The House of Representatives and the Senate.
When we are electing a president, the legislative branch exercises democracy because when the people of a specific state vote for someone, majority whens and the number of the Senators and Representatives that state has counts for a vote for that person who’s campaigning. That is how the legislative branch helps in democracy.
(I’m aslo hoping you have some idea of what the legislative branch is, thats why i didnt explain it like you’re 3, like i usually do to answer questions. Hope this helped).