Captain America's Shield. Dr. The shield has great aerodynamic properties: it is able to slice through the air with minimal wind resistance and deflection of path. Its great overall resilience, combined with its natural concentric stiffness, enables it to rebound from objects with minimal loss of angular momentum.
Pneumonia is an infection of the lungs. People with pneumonia often complain about coughing, fever, shaking chills, and shortness of breath. 1  Your body's immune system usually keeps bacteria from infecting your lungs.2  In pneumonia, bacteria reproduce in your lungs, while your body tries to fight off the infection.f you inhale toxic materials, you can injure your lungs and cause chemical pneumonia. Fungus also can cause pneumonia. In certain areas of the United States, specific fungi are well known. Coccidioidomycosis causes a pneumonia called San Joaquin fever or  Valley fever  in the desert regions of California.
Many different germs can cause pneumonia, but there are five main causes: bacteria, viruses, mycoplasma (a type of bacteria that is resistant to penicillin), other infectious agents, such as fungi, and various chemicals. If you have viral pneumonia, you also are at risk of getting bacterial pneumonia. The main cause of pneumonia is the bacteria streptococcus pneumoniae. Professor Brian Duerden CBE, the chief micro-biologist at the Department of Health, said the bacteria can also cause or lead to numerous other invasive infections. It can cause other chest infections in old people as well as pneumonia, he said. It can affect young children when it can get into their blood streams. It can cause septicemia. It is also the most important cause of meningitis in very young children. In some people it can get into the sinuses and into the middle ear and cause further infection. Understanding the cause of pneumonia is important because pneumonia treatment depends on its cause.