Viral colds can cause recurrent fever, and their infectious agents are usually rhinovirus, adenovirus, respiratory syncytial virus, haemolytic streptococcus, etc. They can easily cause fever, chills, nasal congestion, runny nose and general aches and pains, which can be manifested as recurrent fever. In addition to routine blood tests and CT, pathogenic tests are also needed to identify the type of bacteria and viruses causing the infection.