Flu

The flu is caused by the flu virus. It’s more serious than a cold. Usually there is fever, chills, colds, cough, sore throat, headache, muscles, body fatigue. You feel unhappy and tired and have no appetite. Abdominal pain, nausea, vomiting, or diarrhea may also occur.
Diseases caused by viruses that infect the airways are contagious and can easily spread from person to person. Cold can be caused by many viruses. Symptoms are usually mild sore throat, clogged nose, runny nose, increased blood flow in nose or throat, coughing, or sneezing. If fever is present, it is a lower fever. A cold makes you feel worse than usual, but you manage normal activities during the day. If the lining inside the nasal cavity is weakened the tissue is moist, the virus-weakened mucosa is attacked by a bacterial infection that causes inflammation. Bacterial infections are associated with virus infection.