How long can a virus (e.g. SARS-COV2) survive in food?

Kenji Lopez-Alt did a very in-depth article for Serious Eats about the coronavirus and food that is worth reading. There is no evidence of the coronavirus (or covid) being passed through food, because in general the virus would break down too quickly to be passed on. Viruses survive better on non-porous surfaces. The full article is here:

https://www.seriouseats.com/2020/03/food-safety-and-coronavirus-a-comprehensive-guide.html

People have been studying how the coronavirus spreads. Because foodborne illnesses are common, it is standard procedure to check for patterns of foodborne transmission: That is, several people who ate the same thing all getting the disease afterwards. Because of the scope of the pandemic, we have a lot of data to check for such occurences and thus the absence of a single documented case is very strong empiric evidence that it can't happen under normal circumstances.

If the purely empirical data doesn't satisfy you, you will probably need to wait and hope someone does some experiments to explain why exactly transmission doesn't happen over food (or maybe someone would need to do an actual literature search instead of 5 minutes of googling). Covid-19 can survive the acidity of the stomach according to this open access study, so that easiest of possible explanations can sadly be ruled out. According to this page, there is a study that showed MERS-Cov can survive for some time in milk, but is deactivated by pasteurizing and no similar studies for Covid-19 exist.