Learn about Alexandra Michelle: her birthday, what she did before fame, her family life, fun trivia facts, popularity rankings, and more. Fun facts: before fame, family life, popularity rankings, and more.
Viruses cause such respiratory infections as the common cold (rhinovirus), the flu (influenza), some pneumonias and bronchiolitis (respiratory syncytial virus, or RSV). It can be difficult to determine whether you have a viral or bacterial infection because the symptoms are often similar.
An upper respiratory infection (URI), also known as the common cold, is one of the most common illnesses, leading to more health care provider visits and absences from school and work than any other illness every year.It is estimated that during a 1-year period, people in the U.S. will suffer 1 billion colds.n fact, over 200 different varieties of viruses can cause the symptoms of a cold. The most common viruses that cause colds are called rhinoviruses. Other virus types include coronavirus, parainfluenza, adenovirus, enterovirus, and respiratory syncytial virus.