However, the scientists also said that since the influenza strain keeps on changing, flu could also appear with more than one symptom at once.

As per WHO statistics, fever is one of the most widely reported symptoms in COVID-cases worldwide, seen in 87.9 per cent cases across 55,924 laboratories (as of June).

Dr Robert Glatter, a physician commented:

“The study found that patients with seasonal flu more commonly developed a cough before the onset of fever. In reality, this may be difficult to discern since the flu often begins abruptly with a triad of symptoms, including back pain, chills, along with a dry cough.”