Porquê os dois metros?

Government scientific adviser says Britain's two metre social distancing rule is unnecessary and based on 'very fragile' evidence: The World Health Organization recommends a minimum of one metre 

Two-metre coronavirus rule ‘will bankrupt businesses’: The Sage scientific panel has concluded a review into the two-metre rule and advised ministers that it should stay in the belief that blurring it would be confusing. Downing Street said yesterday that it had no plans to change the “sensible and safe distance”.