Study of pre-existing antibodies to COVID in the Vancouver area:

"We determine that more than 90% of uninfected adults showed antibody reactivity against the spike, receptor-binding domain (RBD), N-terminal domains (NTD) or the nucleocapsid (N) protein from SARS-CoV-2."

If other regions are significantly less than 90%, that could explain a lot re: differences in covid case growth; Vancouver wasn't hit particularly hard.

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@pete Does that mean only 10% have natural susceptibility to the virus? Or does that include people who were infected in the past?

I wonder if that’s related to high number of individuals with Chinese ancestry. They being less vulnerable to a virus probably originated in China would make sense, and that might also help explain why numbers in China got better relatively faster.

Perhaps Wuhan population has different genetics?

@lucash_dev Well remember that reactivity doesn't mean you're totally immune. But it may reduce deaths and symptoms.

As for what is causing that, most likely other diseases. Lots of evidence that other coronavirus infections have a degree of cross immunity. Which yes, the very high asian population could be doing that. Be interesting to do the same tests in Toronto.

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