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.
Although theyâre usually more common in winter, colds have very little to do with cold weather. Colds are caused by viruses. There are over 200 viruses that cause the common cold and at least one cold virus is in circulation at any given time. Cold Symptoms.