mushrooom a dont know which youtube site you got your information from about 12-32% of us have had Corona but it just shows how much misinfamation is out there.
You mustnt be aware that samples are done where 100000 peopel are tested in each time period across England and these still show only 6% of peopel have the viruss antibodies. It was 6% in August and still 6% in October in England/
You'll after read this to find out the reality
https://www.theguardian.com/world/2020/oct/27/proportion-of-people-in-england-with-covid-antibodies-has-fallen-study-says
From the article- "When you think that 95 out of 100 people are unlikely to be immune and therefore likely to be susceptible, then we are a long, long way from anything resembling a population-level protection against onward transmission,” said co-author Helen Ward, professor of public health at Imperial."
So we'r nowhere near herd immunity and wont be until we role out a vaccinne.
The 32% figure you misundastood as it was the suggested figure in some parts of London (could be as high as 32%)
The figure's for Wales, Scotland and Northen Ireland are also well under 10% AFAIK