Bear in mind in relation to immunity -- "Positive results may be due to past or present infection with non-SARS-CoV-2 coronavirus strains, such as coronavirus HKU1, NL63, OC43, or 229E."
If true, we might rush to get everyone cold and then be immune to coronavirus.
"FDA is working on treatment of coronavirus with blood from recovered patients"
"The method — essentially harvesting virus-fighting antibodies from the blood of previously infected patients — dates back more than a century"
https://www.nbcnews.com/health/health-news/fda-working-treat...
I’m hoping this is true, since it suggests new parents are mostly OK too.
Vaccines are obviously the best bet, but I wonder whether deliberately exposing the healthy to common cold Coronavirus might improve herd immunity against this Coronavirus. E.g. maybe in late summer it can be used to forestall a second wave of Coronavirus spread in the winter.
"Certainly, this test cannot confirm virus presence, only provide evidence of recent infection, but it provides an important immunological evidence for physicians to make the correct diagnosis along with other tests and to start treatment of patients. In addition, possible cross-reactivity with other coronaviruses and flu viruses were not studied, and the change level of antibody was not compared in the different stages of SARS-CoV-2 infection."