|
|
As the western states of America were settled, pioneers often had to drink rancid water from ponds and other sources. This often resulted in chronic diarrhea, causing many cases of dehydration and death that could have been avoided if clean water had been available.
Only one in 10 cancer deaths is caused by the primary tumor. The vast majority of cancer mortality is caused by cells breaking away from the main tumor and metastasizing to other parts of the body, such as the brain, bones, or liver.
After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.
There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
Asthma cases in Americans are about 75% higher today than they were in 1980.