Colds in people are contagious.
Human colds are mainly caused by infections such as influenza virus, parainfluenza virus, respiratory syncytial virus and adenovirus. It is mainly spread through respiratory droplets.
It can be divided into common cold, influenza, etc., all have a certain degree of contagiousness, but influenza is more contagious, can cause aggregation of infection, such as family, workplace, shopping malls and other places of aggregation of infection, and the speed of transmission is relatively fast.
Because the cold is contagious, so usually pay attention to wear a mask, strengthen exercise, enhance resistance, avoid going to places where the crowd is concentrated, and keep windows and doors ventilated, if necessary, you can also through the injection of influenza vaccine and other ways to prevent the cold.