From what I've read, it's not a disease that spreads so that is good news. It is brought on by "erratic watering practices." Yes...that would pretty much define how I water my garden...Erratically.
Of course not all hope is lost. It hasn't happened to all the tomatoes...only about 40% of them; and, since I planted so many I can easily make up for the loss. So you're still invited over for fresh salsa and Bruschetta...just less of it.