If there were no atmosphere, the sky would be all black, except for the area directly around the sun, which you would not be able to look anywhere near because it would be so bright, as there would be no atmosphere to block its rays.
Contagion and contagiousness refers to how easily the spread of Genetic Disease is possible from one person to another. Other words for contagion include infection, infectiousness, transmission or transmissability. Contagiousness has nothing to do with genetics or inheriting diseases from parents.
Need a list of common diseases? The most common illnesses are listed here by name, including information about their symptoms. They include the most common communicable diseases and and common infectious diseases.Most common bacterial diseases and common viral diseases can be gotten over quickly or treated medically by a doctor.Since these are so common, there's definitely treatments for these common ailments. For more information about genetic diseases you can see this genetic disorders list.For valuable information on central nervous system disorders see the central nervous system disorders page.eed a list of common diseases? The most common illnesses are listed here by name, including information about their symptoms. They include the most common communicable diseases and and common infectious diseases.