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.
Introduction. A cold is a mild viral infection of the nose, throat, sinuses and upper airways. It's very common and usually clears up on its own within a week or two. The main symptoms of a cold include: 1  a sore throat. 2  a blocked or runny nose. 3  sneezing. 4  a cough.