Is it true that when your mucus turns yellow it’s time for an anti-biotic?

I don’t quite know how to say this in as many languages as possible, but “No … Nein … La … nyet” Antibiotics only treat bacterial infections. They have no effect against viral infections and so have no effect against the viruses that cause the common cold and flu.
Viral respiratory infections are characterized by clear thin mucous from your nose or back of your throat for the first phase of the illness. Infection-fighting cells then move into the area to fight off the infection. These cells secrete proteins that alter mucous colour - causing clear mucous to turn those lovely shades of yellow and green. This is the normal sequence of events, and taking an antibiotic will have no impact on this process. According to the World Health Organization, antibiotic resistance is one of the world's most pressing public health problems. When bacteria are repeatedly exposed to antibiotics, the germs in your body change, which may allow them to completely repel the antibiotic at times when you really need them. When that happens, your illness could either linger or suddenly take a turn for the worse.
Our children are our biggest concern cause they tend to have the highest antibiotic usage rates. Parents - you need to be the bigger people here, literally. One study showed that doctors prescribe antibiotics 60% of the time if they think parents expect them to and only 7% of the time if they feel parents don’t expect them.