I came across this piece of research regarding the transmission of a coronavirus strain via common houseflies. The reference is as follows:
Calibeo-Hayes D, Denning SS, Stringham SM, Guy JS, Smith LG, Watson DW. Mechanical transmission of turkey coronavirus by domestic houseflies (Musca domestica Linnaeaus). Avian diseases. 2003 Jan;47(1):149-53.
There is an emerging realisation COVID-19 is not only transmitted by aerosol but also by the fecal-oral route. Bearing this in mind would it be appropriate to advise the general public at large to keep flies out of their homes during the current crisis? Secondly, in countries where open defecation is practiced should there be a concerted drive to control insects?
Yes, there are chances of spread by Houseflies. Hence all shall take care of them including all governments
Flies can potentially carry SARS-Cov-2 to objects and food (fomites) and can transmit COVID-19.
However, no scientific publication has addressed this route of transmission.
Please take a look at this useful RG link.
Article A Brief Review on the Possible Role of Houseflies and Cockro...
To date, there is no evidence of COVID-19 transmission by blood-sucking arthropods such as mosquitoes. However, insects such as cockroaches and houseflies, which are major mechanical vectors of pathogens, may be able to transmit the disease by contact with contaminated surfaces and even with the feces of infected individuals but further researches are required to prove it.
Agreed. But we may well have one such opportunity at researching this, too. I have contacted Public Health Wales about an outbreak at the Two Sisters poultry processing plant in Llangefni, North Wales. There was a sudden massive spike which infected in excess of 150 employees there. The plant is in very close proximity to a sewage treatment plant and given the fecal oral transmission capability of the virus it's not beyond the realm of impossibility the plant outbreak may have been exacerbated by houseflies.