Does a novel infection always cause fever?

Novel coronavirus infection is an acute infectious pneumonia caused by a previously unidentified novel coronavirus in humans. Initial symptoms commonly include fever, fatigue, and dry cough, progressing gradually to severe manifestations such as dyspnea. So, does novel coronavirus infection always cause persistent fever? Below, we provide a detailed explanation of this question.

Does novel coronavirus infection always cause persistent fever?

Some patients with novel coronavirus infection present with mild initial symptoms and may not develop fever at all. In moderate and critical cases, fever may be low-grade or moderate during the course of illness—or even absent altogether. Therefore, persistent fever is not an obligatory feature of novel coronavirus infection. Conversely, persistent fever does not necessarily indicate novel coronavirus infection; common colds can also cause prolonged fever. To determine whether persistent fever is attributable to novel coronavirus infection, consider whether you have had close contact with confirmed or suspected cases. If no such exposure occurred, the fever is more likely due to ordinary influenza virus or bacterial infection. If you remain concerned, consult a healthcare facility for evaluation to rule out novel coronavirus infection and ensure timely treatment.

Knowledge Expansion: Symptoms of Novel Coronavirus Infection

The predominant clinical manifestations of novel coronavirus infection are fever, fatigue, and dry cough; upper respiratory symptoms such as nasal congestion and rhinorrhea are relatively uncommon. Approximately half of affected individuals develop dyspnea approximately one week after symptom onset. Severe cases may rapidly progress to acute respiratory distress syndrome (ARDS), septic shock, refractory metabolic acidosis, and coagulopathy.

Notably, critically ill and severely ill patients may exhibit only low- to moderate-grade fever—or no fever at all—during their illness course. Some patients experience only mild initial symptoms and may remain afebrile; recovery typically occurs within one week. Most patients have favorable outcomes, while a minority develop critical illness that may result in death.

The above covers all essential information regarding whether novel coronavirus infection always causes persistent fever, and we hope it proves helpful.