This has just popped up on another forum. Isreal is reporting cases of patients who are testing positive for both Covid and Influenza. The only report that I can find is this one from the Express
www.express.co.uk/news/science/1543223/covid-news-latest-flurona-israel-coronavirus-and-flu-pandemic-fears
And it reads, to me, like it's only been found in pregnant women so far.
Now before everyone starts panicking or writing this off as a scaremongering tactic, yes while I can not sight a previous case of someone testing positive to both Covid & Influenza at the same time, I would put a month's wages on it has occurred.
However, let's just remember that at the moment Isreal is reporting 2000 people in hospital with Influenza, a major problem with Avian Flu (5000 Cranes have died and they are culling domesticated flocks).
All this adds up to an interesting Petri dish for possible mutations of three relatively closely related viruses, two of which already have a taste for human