The human body is mostly made up of water (H2O), and there is one oxygen atom in each molecule of water. Note that, although each water molecule also contains two hydrogen atoms, the atomic mass of hydrogen (about 1) is much smaller than the atomic mass of oxygen (about 16). Because of this, hydrogen contributes less to human body mass than oxygen.
Compiles statistics and information on disease, publishes health information, and investigates and addresses serious health problems throughout the world. would work with providing vaccinations in third world countries.
The emergency room would be better in case its severe
