[1andrew1]

Study suggests few Americans have Covid-19 antibodies
Survey indicates vast majority may not have an immune response despite high infection numbers
Fewer than 10 per cent of Americans have antibodies that could protect them from developing Covid-19, according to the first nationally representative survey that shows the vast majority still have not developed an immune response to the virus.

The serological survey, published in the medical journal The Lancet on Friday, also found that black and Hispanic communities had two to four times higher rates of antibodies to Sars-Cov-2, the virus that causes Covid-19, after they were hit harder by outbreaks earlier this year.

Julie Parsonnet, a professor of medicine at Stanford University and author of the study, said vulnerable populations would need to be protected until an effective vaccine is approved...

The study, conducted in July, comes as US public health leaders are pushing back against an argument from some allies of President Donald Trump that certain communities could be near herd immunity, the point at which a virus has difficulty spreading because so many people are immune.

https://www.ft.com/content/99c23624-...8-eef341464588