Most people recover from a cold within a week.
However, long-term symptoms may indicate something else.
Colds are caused by dozens of different viruses that attack the upper respiratory tract, the back of the throat and sometimes the lungs, The Sun reports.
Some people may become more infected than others due to their level of immunity to a particular virus.
In addition, in cold weather the immune system is further weakened, making people more susceptible to illness.
However, there are a number of reasons why a cold lasts longer.
According to British doctors, numerous viruses are able to penetrate into the lower parts of the lungs, causing bronchitis and sore throat.
These infections last longer because damaged cells take longer to repair themselves.
Rhinoviruses are usually the cause of the common cold, and seasonal coronaviruses can also cause coughing along with fever.
Additionally, respiratory syncytial virus can cause cold-like symptoms and can last up to two weeks.
If the temperature persists for more than 3-4 days, and there is a cough and shortness of breath, this indicates more serious illnesses and requires a visit to the doctor.
Author: Elena Gutyro
