It's pretty close. I mean, he wasn't talking about
specifically coronaviruses, because that's not the
only kind of virus that could escape from a biolab. But he contracted discussion of SARS and coronaviruses to "[An example]".
Editing old blog posts is probably not the right way to do this. But bear in mind the whole biolab escape theory is entirely plausible. Such things have happened before. The 2007 foot and mouth epidemic in the UK was traced back to an escape from a lab at Pirbright. There were at least two outbreaks of Marburg Virus (ebola) in the USSR due to lab escapes.
I don't really understand the certainty many people here seem to have, about how it couldn't possibly have come from the Wuhan lab. How could you know that? Such escapes have happened repeatedly, that was sort of the point of Cummings' blog post.