evidence: "This is to inform us all that the pH for corona virus varies from 5.5 to 8.5," reads a graphic shared on WhatsApp. It says this is based on "research" from "Journal of Virology, April 1991". A similar claim is going around Facebook where it is used to sell an "alkaline cup". The graphic goes on: "All we need to do, to beat corona virus, we need to take more of an alkaline foods that are above the above pH level of the Virus." It says these foods include lemon, lime, avocado and garlic but doesn’t say how exactly they beat it. [...] But could the pH for the new coronavirus "vary from 5.5 to 8.5"? We checked.