That's a statement from a politician, not a scientific result. He's not predicting "almost there", he says they "could" reach herd immunity within a month. And that 30% with immunity number quoted is wildly off from the actual research already done on this stuff in Italy and New York. In fact the back of my envelope tells me that it requires an even higher asymptomatic undercount than even the Stanford study did.

This isn't evidence. You're reading spin. The article even tells you that.