GracesGranMK3 I think you are over-reacting to Hetty58's post.
I think she was quite right to question the alleged source of the information and to inform you that it was incorrect.
Lots of people are reading these threads and, on a serious matter like the virus, it is important that information passed on is not incorrect or from an unreliable source.
Of course, people are at liberty to do their own research to check that a source is genuine and to see if the information given is largely accepted by the experts, but not everybody is going to do that.
It's sensible to be careful about hygiene but I don't think anybody can completely eliminate risk. I rely principally on washing my hands frequently, washing tea towels every other day, thoroughly rinsing washing up/cleaning cloths every time they are used and hanging on a hook to dry, and keeping work surfaces as uncluttered and clean as possible.
I can't see how it is possible to thoroughly disinfect shopping.