Negative for coronavirus test but has fever

Testing negative for the novel coronavirus but experiencing fever may be due to false-negative test results, viral influenza, acute gastroenteritis, or other causes. Further evaluation is necessary, and targeted treatment should begin as early as possible under a doctor's guidance.

1. False-negative test result

A negative test result for the novel coronavirus accompanied by fever might stem from inaccurate antigen testing or improper testing procedures leading to a false-negative outcome. It is recommended to undergo individual single-tube testing at a hospital. Once diagnosed with COVID-19, prompt symptomatic treatment should be initiated. Medications such as ibuprofen sustained-release capsules or acetaminophen tablets may be used according to medical advice to alleviate fever symptoms.

2. Viral influenza

Fever despite a negative coronavirus test could also result from viral influenza. Under medical guidance, antipyretic and analgesic medications can be taken, along with remedies to relieve cold symptoms, such as diclofenac sodium or compound aspirin.

3. Acute gastroenteritis

Fever in the presence of a negative coronavirus test may also be caused by acute gastroenteritis resulting from consuming contaminated food recently, leading to fever. Treatment typically involves following a physician’s instructions to take anti-infective medications such as levofloxacin or enteritis relief pills. It is important to avoid spicy and irritating foods, drink plenty of water, and consume light, easily digestible meals.

In addition, conditions such as tonsillitis, otitis media, and lymphoma can also cause fever. During periods of novel coronavirus transmission, it is essential to take appropriate preventive measures, including boosting immune function, interrupting transmission routes, and avoiding contact with sources of infection to prevent contracting the virus.