Antivaxxers want to be able to enter places where a QR code is required, but don't want to get vaccinated.
https://www.ons.gov.uk/peoplepopulationandcommunity/healthan...
Whilst your comment is factual, I think it doesn’t make sense in the context. The barrier to purchasing a certificate off the dark web is high and require a fair amount of financial and personal conviction / exposure…
"Recovered person" is defined here if you want to look it up: SchAusnahmV §2.4, §2.5 [0].
[0] https://www.bmjv.de/SharedDocs/Gesetzgebungsverfahren/Dokume...
[0] https://www.gesetze-im-internet.de/schausnahmv/BJNR612800021...