When I was trying to dig through the chaff eventually I found the magic phrase viral tropism. It's complicated. You have the ability of the virus to infect pa

When I was trying to dig through the chaff eventually I found the magic phrase viral tropism. It's complicated. You have the ability of the virus to infect particular tissues. Sometimes viruses have a primary and secondary attack. What the viruses life cycle is in the host. Chicken pox's isn't influenza's. There is the ability of the virus to evade and suppress the immune response. And finally you have the point that viruses can trigger autoimmune responses. I saw lots of back and forth about neurological stuff. Best response was from someone that studies neurology that pointed out that 'the brain' is made up of dozens of cell types. Viral damage or an autoimmune attack on any of those can be very ungood. Also I think about 50-60 years ago the medical profession lost interest in respiratory viruses. So much information is absent, out dated, or the result of 50 years of telephone.