westward expansion
Rats that were infected by the disease and have died on the side of the street to easily spread the disease
Dutch Elm disease is a tree disease that is spread by beetles. It is caused by a fungus carried by elm bark beetles, which feed on the bark of elm trees, introducing the disease into the tree's vascular system.
Scurvy.....Scurvy cannot be spread, it is a deficiency disease. Scurvy is caused by a severe lack of vitamin C.
the disease caused by fly are mainly dihhorea,cholera,tubercolosis ,loose motions,.generally the communicable disease are spread by flies
Aftosa is a viral disease that affects different forms of livestock, predominantly cattle, and can cause symptoms such as fever, blisters in the mouth and on the feet, and lameness. It can spread rapidly among susceptible animals and can have significant economic impacts on the livestock industry. Vaccination and biosecurity measures are important in preventing the spread of aftosa.
Bubonic Plague
we can prevent this with keeping our body healthy.
Disease, bad crops, lack of livestock.
It was a bacterium that caused it, but rats and fleas between them were the vector which spread the disease.
No. Cancer is a disease. Dengue is caused by a virus and spread by mosquitoes.
A disease called SMALL POX.
Sepsis, septicemia.