A mixture: 1  can be separated into 2 or more substances by physical or mechanical means. 2  displays the properties of the pure substances making it up. 3  its composition can be varied by changing the proportion of pure substances making it up.  heterogeneous substances, ones with non-uniform composition throughout the sample, are always mixtures.
Injection Site Symptoms. At least half of all people who receive pneumonia shots will experience mild side effects in the area of injection, such as pain or redness. Less commonly, swelling or hardness may also occur in the area. These symptoms can limit movement of the arm or leg where the shot was given.
Pneumonia symptoms can vary from mild to severe, depending on the type of pneumonia you have, your age and health. The most common symptoms of pneumonia are: 1  Cough (with some pneumonias you may cough up greenish or yellow mucus, or even bloody mucus). 2  Fever, which may be mild or high.3  Shaking chills. 4  Shortness of breath, which may only occur when you climb stairs.he most common symptoms of pneumonia are: 1  Cough (with some pneumonias you may cough up greenish or yellow mucus, or even bloody mucus). 2  Fever, which may be mild or high. 3  Shaking chills. 4  Shortness of breath, which may only occur when you climb stairs.