SARS-CoV-2 and Influenza viruses are independently different viruses. It is not true that influenza infection has increased. It is simply because during the COVID-19 pandemic, a respiratory panel of different viruses are included in the testing along with COVID-19 testing, so in numbers the Influenza and other respiratory viruses are being detected more commonly and counted.
Concomitant infection of SARS-CoV-2 and Influenza virus are being increasingly reported and has a worse prognosis compared to each viral infection alone, therefore it is strongly recommended to have Influenza vaccine shot during this coming winter season.
When people are infected with seasonal influenza, their body’s immunity is unable to resist the other viruses types due to the immune system’s preoccupation with resisting the seasonal flu. For the same reason, people with seasonal flu are more susceptible to COVID-19.
Briefly. There is a direct relationship between seasonal influenza virus and covid-19.
Not direct relationship. However, there could be an indirect relationship between the two viruses, especially if they are hitting the same immune system simultaneously or one after the other during a short period of time..