Cold and fever, will it be contagious? It is important to identify the cause in such cases. If it is caused by bacteria or other microbial infections, it generally has no contagiousness. However, if the cold is due to an influenza virus infection, there is a certain level of contagiousness. Therefore, it is not possible to generalize whether colds and fevers are easily contagious. It is advised that everyone should go to the hospital for a check-up to determine the cause of the cold and then treat it accordingly. If the cold is caused by a virus or the influenza virus, it is contagious. If it is caused by some bacteria or other microbial infection, it is not contagious. It is also advised that everyone should follow the doctor's guidance and take the corresponding anti-infection medication for treatment and to relieve symptoms. Eat light meals, drink plenty of water, promote excretion, and enhance resistance.