Corona doesn't act like influenza, it attaches to cell receptors using what is called a spike protein, different corona viruses have different shapes in their spike proteins, some aren't as harmful as others. Figuring how to keep it from attaching is what the problem is as there are many different cells throughout the body that it has proven to be successful at attaching to and spreading, this is why it's so deadly and complicated finding a way to neutralize it as the virus has so many different means to attaching itself throughout the body to many different cells and why there is so many different ailments associated with it.