Sorry to hear about your concerns, and hope that your friend improves quickly. There are obviously many possible explanations for the symptoms that you are describing, and it is always best to discuss these concerns with your doctor
. Influenza and many other viruses can be very contagious, and even something as simple as sitting next to someone can be enough to contract a virus, depending on many other factors, of course. In some cases, these viral illnesses can predispose patients to other, secondary, infections such as the pneumonia
that you describe in your friend. Viral infections will often (but not always) spread more readily than the bacterial infections, however. In general, some of the first symptoms of getting a viral infection can be a feeling of fatigue and generally feeling unwell. Increased nasal congestion, mucous production, fever
, chills, and shakes can follow as your body attempts to clear the infection. Whether or not you have some of these symptoms can be a sign of how well your body is doing at clearing these infections. Eating well, exercising, being healthy, and washing your hands frequently can all help to reduce the risk of infection. Please speak with your doctor about your question.