A platelet count of less than 150,000 platelets per microliter is lower than normal. If your blood platelet count falls below normal, you have thrombocytopenia. However, the risk for serious bleeding doesn't occur until the count becomes very lowâless than 10,000 or 20,000 platelets per microliter.
Health related question in topics Conditions Illness .We found some answers as below for this question Is chicken pox a bacterial or viral disease,you can compare them. Is chicken pox a bacterial or viral disease. Chickenpox A highly infectious viral disease also known medically as varicella, in many countries, it is always called varicella [ Source: http://www.chacha.com/question/is-chicken-pox-a-bacterial-or-viral-disease ] More Answers to  Health related question in topics Conditions Illness .We found some answers as below for this question Is chicken pox a bacterial or viral disease,you can compare them.
It is caused by varicella-zoster virus (VZV), which enters the body through the mouth and nose after contact with an infected person. A person with chickenpox can spread the disease to someone else from one day before the rash appears until all chickenpox blisters have crusted over. Once someone has had a chickenpox infection, he or she almost always develops a lifelong immunity, meaning that person usually does not get chickenpox a second time.