because it can decompose quickly and reproduce quickly
The population is higher, so people are living closer together, making it easier to spread diseases that require close human contact to be spread.
it spreded so rapidly because of how the y were fighting across seas and the spread became to get bigger and bigger
People and rats lived in extremely close (and very filthy) conditions, making it easy for the plague to spread rapidly.
fires speard rapidly because the fire fighters did not have any water to but them out
Americans should keep the country so that humans and animals don't get diseases or spread those horrible diseases Americans should keep the country so that humans and animals don't get diseases or spread those horrible diseases
rats
Don't think so. It has life.
They learn about diseases Take a chimp for example scientists use chimps so that they can discover about diseases that can spread to humans.
Indians had not faced many diseases in the past, they were uneducated in how to protect themselves. When an Indian would get sick, they would not isolate that individual like they should have. Instead, they would continuously mingle with the others which caused for the disease to spread rapidly throughout the other members of the tribe.
Because sailors took it along routes into Europe where it eventually spread.
I'm not so sure of what your asking and what your question is but if your asking how can or how do you pass or spread diseases my answer would be by germs!
It is a myth that toilet seats spread diseases. They in fact have far fewer germs on them than sinks, kitchen counters, computer keyboards and dining tables.