What i don't understand is, if it prevents covid for a longer term or just for a few hours. The article mentions that it prevents that the virus can enter cells, but to me it sounds like it only prevents as long as the spray is present?
I am sorry this thread got hijacked. I had the same thought as the OP: vaccines work by training the bodies own defences. The description of this spray sounds more like a disinfectant that prevents the virus from binding to human cells. Can anyone knowledgeable on HN clarify this?
The mucosal immune system in the respiratory tract is the first line of defense against covid. An interstitial injection does not train the mucosal immune system, while a nasal vaccine does. To prevent any infection, the mucosal immune system needs to be primed.