Both Influenza and COVID-19 cause certain similar signs and symptoms in infected individuals, including breathing difficulty, cough, fever, sore throat, fatigue, and runny nose. Influenza and COVID-19 are both conditions that infect the respiratory system. For both conditions, the incubation period can be one or more days.
In other words, the time of infection to the manifestation of symptoms can last for one or more days. Influenza and COVID-19 can transmit from an infected individual to another person when they are in close proximity. Both diseases are spread mostly by big and minute particles carrying the virus discharged when infected persons sneeze, cough, or talk. In both cases, asymptomatic infected persons can spread influenza viruses and the virus that causes COVID-19 to others.