I thought Spahns full statement was reasonable. Deferring to what the health organizations report to him, saying that that "would be very good news" (would be, not is), emphasizing multiple times that this is "as of now, sunday evening". If you hear that and take away "we're definitively safe" ...

(Of course I can't judge the biology and if that actually accurately represented the expert opinion behind it, but to me it communicated clearly enough that this isn't a certain claim, but reflecting a current snapshot of something that's actively looked at)