question: Hello,  I am writing to ask about some symptoms I have been experiencing. I am 57 years old. For almost a week I havehad persistent low grade fever (never more than 100.5). After the end of the week, today I no longer has a fever. We did a blood test and found abnormally low amount of platelets: 127 Thousand/ microliter. When we did the blood test six months ago, it was at normal level of 166 thousand/ microliter.  During the fever I had no other symptoms,: no cough, no throat pain, no runny nose, no breathing issue, etc. Even though the fever seems to be gone since today I am very worried as to what may have caused it, if it could be linked to a serious disease. So far the platelet count is the only abnormal thing showing up in the blood test. Thank you.