bbc: 40 - 60% of unexposed population already has T-cell immunity to covid-19 !!

(Of course bbc took that article down fast, even after changing the link to ‘the surfaces that kill bacteria and virus’. Really! Check out the article title in your browser tab vs. of the article itself when looking at the archive here http://archive.is/vA8oY

How is existing immunity possible? Check out this discussion amongst scientists noting that:

‘’Two studies present evidence that 40-60% of unexposed have COVID19 immune response…

‘’A few weeks ago, I suggested that many people, in particular in Asia, may already be immune to COVID19 Virus/SARS-CoV2 because the viruses are of the same strain of SARS-CoV1 of 2003.’’’

https://www.researchgate.net/post/Two_studies_present_evidence_that_40-60_of_unexposed_have_COVID19_immune_response

http://archive.is/X200m

Does this mean the [DS] got royally ripped off when they ordered up covid-19 if they got covid-1 instead?