White vinegar may not be effective in preventing or inactivating the novel coronavirus, and there is no corresponding statement in the latest version of the fifth edition of the treatment guidelines. White vinegar is a common household seasoning, and the concentration of acetic acid in common edible white vinegar is still very low, so common white vinegar at home may not play a role in inactivating the virus. Generally in the vinegar, the proportion of acetic acid is about 6-8%, and if it transpires or evaporates into the air, the concentration is even lower and can hardly play the role of killing the virus. Secondly, even the acetic acid with relatively large concentration is not suitable for fumigation, and the guideline does not give acetic acid can be used to inactivate virus, so white vinegar may still not be used to inactivate virus. Content source: Dr. You Lai