Flu contagious, recognize the signs

Now in my office in season cough and flu season, although now a little better and the germs that cause colds may have fallen asleep, so it is not contagious. Conversely though there are no symptoms, at any given time remains flu contagious. How to recognize the flu contagious?

There are several types of cold, There's a new contagious after symptoms appear, there is also secretly been transmitted while no signs of infection.

Several types of cold with signs indicating a critical period of transmission is as follows, as quoted from Health24 :


1. Common cold (common cold)
there are about 200 types of viruses that can cause colds, most of them transmitted through the air and can only be prevented by good personal hygiene including wearing a mask when many people got colds.

Symptoms include sneezing, coughing, runny nose and sore throat. However, colds can be contagious from 1 day before symptoms appear until eight days later.