Well most of the time it is because you are in the stage of the sickness called "incubation". During this phase, in certain types of virus, including the flu, you can pass it along to others even though you don't have any symptoms yet yourself. You won't have symptoms until the virus has begun to reproduce in your cells and destroys the cells when the virus particles burst them open to release the new virus particles. That damage to your cells and the fact that your cells are busy making viruses instead of doing their normal jobs are what cause you to notice symptoms. See the related question below for more about the flu incubation periods.
There are several symptoms of the flu, or Influenza A. These symptoms include, fever, body aches, sore throat, headaches, nonproductive cough, nausea, and vomiting.
There are several different symptoms one can experience if they have bilharzia. Some of these symptoms include headache, joint pain, coughing, bloody diarrhea, and other bowel problems.
There are several different symptoms a man may experience during hysteria. Some of these symptoms include nervousness, hallucinations, emotional outbursts, and extreme urges of sexual desire.
There are several symptoms you may experience if you are in shock. Some of these symptoms include lightheadedness, anxiety, rapid or shallow breathing, cool skin, clammy skin, confusion, and decrease in blood pressure.
People suffering from schizophrenia may experience several symptoms such as, hallucinations, delusions, thought and movement disorders, lack of pleasure and no enthusiasm to fulfill day to day tasks.
There are several different symptoms you can experience if you have brain damage. Some of these symptoms include difficulty processing information, change in vision, change in other senses, balance issues, and tremors.
There are several different symptoms you can experience if you have something wrong with your spleen. Some of these symptoms include easy bleeding, frequent infections, fatigue, anemia, feeling full very fast, and pain in the left upper abdomen.
Crohn's Disease has several symptoms. One should see a doctor if they experience any of these symptoms because these could also be part of a larger or worse problem. Some of the symptoms include: diarrhea, abdominal cramping and pain, bloody stool, fever, and fatigue.
http://www.healthatoz.info/diseases/amoebic-dysentery.htm See this site for symptoms and suggestions..
There are several different symptoms you can experience if you have a blood clot in your leg. Some of these include swelling, pain, warmth and redness, and the leg may turn pale or even blue in color.
There are several different symptoms of PTSD. PTSD, or Post Traumatic Stress Disorder, can happen when a person experiences a traumatic event. Some symptoms of this can be, reliving the experience of the trauma over and over, avoiding anything that may remind one of the trauma, or being overly anxious and emotional.
There are several different symptoms of PTSD. PTSD, or Post Traumatic Stress Disorder, can happen when a person experiences a traumatic event. Some symptoms of this can be, reliving the experience of the trauma over and over, avoiding anything that may remind one of the trauma, or being overly anxious and emotional.