Polio viruses affecting motor neurons, conceptual computer illustration. In severe cases of the polio disease the virus infects the central nervous system (CNS) causing inflammation of nervous tissue and cell death. The death of the neurons (nerve cells) causes weakness in the muscles that they serve and can lead to paralysis. Cases have fallen by 99 percent since 1988 thanks to global efforts to eradicate the disease. | |
Lizenzart: | Lizenzfrei |
Credit: | Science Photo Library / Kon, Kateryna |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |