the mafia
Louis Pasteur
shots, or the less painful nasal spray.
James Green discovered them cos he watched them on a cartoon.
A Blood specialist studys the blood and all the organs associated with blood. They also study all the blood diseases and find preventions and cures for the blood diseases.
cigarette butts, a hot sun on very dry grass and arsonist to name a few.
Autoimmune diseases were not discovered until the 1950's. Henry G. Kunkel is the doctor who first discovered it by studying patients who had rheumatoid arthritis and lupus.
They were discovered by Louis Pasteur. :P
No-one knows, they haven't been discovered
coussa
in the 1900's
Preventions For Teen PregancyBirth control or abstinence help to prevent teen pregnancy.
A plant pathologist discovered an infectious RNA particle smaller than a virus that causes diseases in plants. He called it a viroid. Millions each year are lost by these viroids. These contain only RNA.