Or is it many more that that? If you would like John’s text books, (it is free to download the PDFs)
Link to free download of my 2 textbooks
http://159.69.48.3/
Physiology book in hard copy
https://www.ebay.co.uk/itm/154770452796?mkevt=1&mkcid=16&mkrid=710-127635-2958-0
140 million Americans have had coronavirus
Nationwide COVID-19 Infection-Induced Antibody Seroprevalence (Commercial laboratories)
https://covid.cdc.gov/covid-data-tracker/#national-lab
https://www.cdc.gov/coronavirus/2019-ncov/cases-updates/commercial-lab-surveys.html
58 % up to 17 years, have antibodies infection
Last data, 72,000 blood samples taken in January
Percentage, United States, resolving or past infection with SARS-CoV-2,
but not how much antibody is present,
do not necessarily indicate the percentage of people with sufficient antibody to protect against reinfection
These percentages do not include people who have been vaccinated against SARS-CoV-2 and have no history of infection.
Results directly from paper
https://pubmed.ncbi.nlm.nih.gov/33231628/
Estimated SARS-CoV-2 Seroprevalence in the US as of September 2020
Nationwide COVID-19 Infection- and Vaccination-Induced Antibody Seroprevalence (Blood donations)
https://covid.cdc.gov/covid-data-tracker/#nationwide-blood-donor-seroprevalence
Percentage, 16 years and older, developed antibodies against SARS-CoV-2 from vaccination or infection.
December 2021
Australia
https://www.health.gov.au/health-alerts/covid-19/case-numbers-and-statistics
UK, ONS
https://www.ons.gov.uk/peoplepopulationandcommunity/healthandsocialcare/conditionsanddiseases/articles/coronaviruscovid19/latestinsights
Week ending 19 February
3.84% in England (1 in 25 people)
3.23% in Wales (1 in 30 people)
7.23% in Northern Ireland (1 in 14 people)
4.57% in Scotland (1 in 20 people)
Source