“Out of the people from Pine Street Inn who were isolated after positive test results, O’Connell says, one ended up in the hospital and some developed mild cold symptoms.” - https://www.wbur.org/commonhealth/2020/04/15/boston-homeless-population-coronavirus-asymptomatic-universal-testing
Here is one of the most significant statements in the article.
"The testing happened a week and a half ago at Pine Street Inn."
I've read that symptoms present at earliest a week after infection, but typically between 14 and 28 days.
If the bums are still going strong after a couple more weeks, then I think the previous assertion is decently supported. Right now I think it's too early to say for sure.
I was going off a Fox25 news report. Still, encouraging.