Antibiotics may be necessary for long-lasting sinus infections. Most sore throats are caused by viruses. Strep can only be diagnosed by a laboratory test. Colds, which sometimes last two weeks or more, are caused by viruses. It's normal for mucous to get thick and change color during a cold.
Antibiotics have no effect on colds.
Texas Medical Association is a professional organization of more than 36,000 physician and medical student members. It is located in Austin and has 118 component county medical societies around the state. The Association represents 85 percent of the doctors of medicine licensed and residing in Texas. TMA's key objective is to improve the health of all Texans.