I don't think the Miami cluster will be limited. I just saw the latest "official" number for home grown cases and it is now up to 21. Unless Florida has an unseasonably cold winter this isn't going to be over by a long shot until they develop a vaccine or stop playing around with new pesticides and bring back some old ones that were banned years ago.
I don't think that 'it's over' (there is a cyclical nature to ZIKV b/c of mosquitoes as vectors and climate patterns).....but unless/until more clusters start revealing themselves rapidly over the next month, I'm hedging against my pessimism. The US, and FL in particular, had a 'heads up' on this several months ago.
For other ZIKV outbreaks, the virus had been circulating for several months before it was detected.
For the Wynwood, Miami cluster, according to the Wall St Journal, the index case of local transmission was a pregnant woman who was a 'sentinel' for it. I could see that happening elsewhere since pregnant women are 2x as likely to get bit by a mosquito, more likely to be tested, and more likely for the virus to be found. And if symptoms were from 'early June' (around the start of mosquito season), it means that ZIKV has been circulating in Wynwood for several weeks, but still a fairly low confirmed case count (IMO). As of today's FL Dept Health update 08-10-16:
1. Open investigation of 2 Wynwood cases; from the 498 samples collected (424 negative, 18 positive, and 46 pending)
2. Open investigation of 1 Miami-Dade case; from 19 samples collected (18 negative, 0 positive, and 1 pending)
2. Closed investigation of 2 Wynwood initial cases where 124 contacts and community individuals tested and no additional positives.